Finding the Fourth Proportional to 1,025.60, 1,415.21 and 632.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.60 : 1,415.21 = 632.52 : x
2. Step 2: Convert to fraction form
   1,025.60/1,415.21 = 632.52/x
3. Step 3: Cross multiply
   1,025.60x = 1,415.21 × 632.52
4. Step 4: Simplify right side
   1,025.60x = 895,145.47
5. Step 5: Solve for x
   x = 895,145.47/1,025.60
6. Step 6: Final answer
   x = 872.81