Finding the Fourth Proportional to 1,293,522.72, 1,785,115.12 and 720,562.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293,522.72 : 1,785,115.12 = 720,562.72 : x
2. Step 2: Convert to fraction form
   1,293,522.72/1,785,115.12 = 720,562.72/x
3. Step 3: Cross multiply
   1,293,522.72x = 1,785,115.12 × 720,562.72
4. Step 4: Simplify right side
   1,293,522.72x = 1,286,287,406,380.33
5. Step 5: Solve for x
   x = 1,286,287,406,380.33/1,293,522.72
6. Step 6: Final answer
   x = 994,406.50