Finding the Fourth Proportional to 1,025.53, 1,414.82 and 631.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.53 : 1,414.82 = 631.87 : x
2. Step 2: Convert to fraction form
   1,025.53/1,414.82 = 631.87/x
3. Step 3: Cross multiply
   1,025.53x = 1,414.82 × 631.87
4. Step 4: Simplify right side
   1,025.53x = 893,976.82
5. Step 5: Solve for x
   x = 893,976.82/1,025.53
6. Step 6: Final answer
   x = 871.73