Finding the Fourth Proportional to 1,015,155,488.98, 1,401,373,604.99 and 639,364,356.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,155,488.98 : 1,401,373,604.99 = 639,364,356.07 : x
2. Step 2: Convert to fraction form
   1,015,155,488.98/1,401,373,604.99 = 639,364,356.07/x
3. Step 3: Cross multiply
   1,015,155,488.98x = 1,401,373,604.99 × 639,364,356.07
4. Step 4: Simplify right side
   1,015,155,488.98x = 895,988,332,567,926,016
5. Step 5: Solve for x
   x = 895,988,332,567,926,016/1,015,155,488.98
6. Step 6: Final answer
   x = 882,611,917.38