Finding the Fourth Proportional to 639,013,900,650.69, 881,866,902,860.58 and 353,872,420,746.69

Step by Step Solution

1. Step 1: Write the proportion equation
   639,013,900,650.69 : 881,866,902,860.58 = 353,872,420,746.69 : x
2. Step 2: Convert to fraction form
   639,013,900,650.69/881,866,902,860.58 = 353,872,420,746.69/x
3. Step 3: Cross multiply
   639,013,900,650.69x = 881,866,902,860.58 × 353,872,420,746.69
4. Step 4: Simplify right side
   639,013,900,650.69x = 312,068,375,691,659,581,587,456
5. Step 5: Solve for x
   x = 312,068,375,691,659,581,587,456/639,013,900,650.69
6. Step 6: Final answer
   x = 488,359,291,361.09