Finding the Fourth Proportional to 718,354.72, 991,970.31 and 684,325

Step by Step Solution

1. Step 1: Write the proportion equation
   718,354.72 : 991,970.31 = 684,325 : x
2. Step 2: Convert to fraction form
   718,354.72/991,970.31 = 684,325/x
3. Step 3: Cross multiply
   718,354.72x = 991,970.31 × 684,325
4. Step 4: Simplify right side
   718,354.72x = 678,830,082,390.75
5. Step 5: Solve for x
   x = 678,830,082,390.75/718,354.72
6. Step 6: Final answer
   x = 944,978.94