Finding the Fourth Proportional to 687,899,111.94, 1,030,828,299.57 and 505,253,469.06

Step by Step Solution

1. Step 1: Write the proportion equation
   687,899,111.94 : 1,030,828,299.57 = 505,253,469.06 : x
2. Step 2: Convert to fraction form
   687,899,111.94/1,030,828,299.57 = 505,253,469.06/x
3. Step 3: Cross multiply
   687,899,111.94x = 1,030,828,299.57 × 505,253,469.06
4. Step 4: Simplify right side
   687,899,111.94x = 520,829,574,362,963,456
5. Step 5: Solve for x
   x = 520,829,574,362,963,456/687,899,111.94
6. Step 6: Final answer
   x = 757,130,755.55