Finding the Fourth Proportional to 639,488.88, 882,494.82 and 353,009.16

Step by Step Solution

1. Step 1: Write the proportion equation
   639,488.88 : 882,494.82 = 353,009.16 : x
2. Step 2: Convert to fraction form
   639,488.88/882,494.82 = 353,009.16/x
3. Step 3: Cross multiply
   639,488.88x = 882,494.82 × 353,009.16
4. Step 4: Simplify right side
   639,488.88x = 311,528,755,112.55
5. Step 5: Solve for x
   x = 311,528,755,112.55/639,488.88
6. Step 6: Final answer
   x = 487,152.73