Finding the Fourth Proportional to 1,131.86, 1,562.01 and 634.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.86 : 1,562.01 = 634.49 : x
2. Step 2: Convert to fraction form
   1,131.86/1,562.01 = 634.49/x
3. Step 3: Cross multiply
   1,131.86x = 1,562.01 × 634.49
4. Step 4: Simplify right side
   1,131.86x = 991,079.30
5. Step 5: Solve for x
   x = 991,079.30/1,131.86
6. Step 6: Final answer
   x = 875.62