Finding the Fourth Proportional to 1,025.55, 1,415.21 and 632.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.55 : 1,415.21 = 632.43 : x
2. Step 2: Convert to fraction form
   1,025.55/1,415.21 = 632.43/x
3. Step 3: Cross multiply
   1,025.55x = 1,415.21 × 632.43
4. Step 4: Simplify right side
   1,025.55x = 895,018.10
5. Step 5: Solve for x
   x = 895,018.10/1,025.55
6. Step 6: Final answer
   x = 872.72