Finding the Fourth Proportional to 1,296,500.99, 1,789,290.41 and 715,827.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,296,500.99 : 1,789,290.41 = 715,827.88 : x
2. Step 2: Convert to fraction form
   1,296,500.99/1,789,290.41 = 715,827.88/x
3. Step 3: Cross multiply
   1,296,500.99x = 1,789,290.41 × 715,827.88
4. Step 4: Simplify right side
   1,296,500.99x = 1,280,823,959,552.10
5. Step 5: Solve for x
   x = 1,280,823,959,552.10/1,296,500.99
6. Step 6: Final answer
   x = 987,908.20