Finding the Fourth Proportional to 1,091.28, 1,505.98 and 625.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.28 : 1,505.98 = 625.52 : x
2. Step 2: Convert to fraction form
   1,091.28/1,505.98 = 625.52/x
3. Step 3: Cross multiply
   1,091.28x = 1,505.98 × 625.52
4. Step 4: Simplify right side
   1,091.28x = 942,020.61
5. Step 5: Solve for x
   x = 942,020.61/1,091.28
6. Step 6: Final answer
   x = 863.23