Finding the Fourth Proportional to 1,281,418,858.72, 1,768,426,686.39 and 716,870,062.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281,418,858.72 : 1,768,426,686.39 = 716,870,062.50 : x
2. Step 2: Convert to fraction form
   1,281,418,858.72/1,768,426,686.39 = 716,870,062.50/x
3. Step 3: Cross multiply
   1,281,418,858.72x = 1,768,426,686.39 × 716,870,062.50
4. Step 4: Simplify right side
   1,281,418,858.72x = 1,267,732,149,199,067,392
5. Step 5: Solve for x
   x = 1,267,732,149,199,067,392/1,281,418,858.72
6. Step 6: Final answer
   x = 989,319,097.79