Finding the Fourth Proportional to 1,172,728.72, 1,618,229.10 and 656,510.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172,728.72 : 1,618,229.10 = 656,510.86 : x
2. Step 2: Convert to fraction form
   1,172,728.72/1,618,229.10 = 656,510.86/x
3. Step 3: Cross multiply
   1,172,728.72x = 1,618,229.10 × 656,510.86
4. Step 4: Simplify right side
   1,172,728.72x = 1,062,384,978,118.03
5. Step 5: Solve for x
   x = 1,062,384,978,118.03/1,172,728.72
6. Step 6: Final answer
   x = 905,908.55