Finding the Fourth Proportional to 2,191,771,449.45, 3,288,205,345.86 and 639,062,770.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191,771,449.45 : 3,288,205,345.86 = 639,062,770.91 : x
2. Step 2: Convert to fraction form
   2,191,771,449.45/3,288,205,345.86 = 639,062,770.91/x
3. Step 3: Cross multiply
   2,191,771,449.45x = 3,288,205,345.86 × 639,062,770.91
4. Step 4: Simplify right side
   2,191,771,449.45x = 2,101,369,619,629,925,376
5. Step 5: Solve for x
   x = 2,101,369,619,629,925,376/2,191,771,449.45
6. Step 6: Final answer
   x = 958,753,988.77