Finding the Fourth Proportional to 1,088.31, 1,629.85 and 624.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.31 : 1,629.85 = 624.69 : x
2. Step 2: Convert to fraction form
   1,088.31/1,629.85 = 624.69/x
3. Step 3: Cross multiply
   1,088.31x = 1,629.85 × 624.69
4. Step 4: Simplify right side
   1,088.31x = 1,018,142.85
5. Step 5: Solve for x
   x = 1,018,142.85/1,088.31
6. Step 6: Final answer
   x = 935.53