Finding the Fourth Proportional to 1,092.31, 1,629.25 and 928.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.31 : 1,629.25 = 928.15 : x
2. Step 2: Convert to fraction form
   1,092.31/1,629.25 = 928.15/x
3. Step 3: Cross multiply
   1,092.31x = 1,629.25 × 928.15
4. Step 4: Simplify right side
   1,092.31x = 1,512,188.39
5. Step 5: Solve for x
   x = 1,512,188.39/1,092.31
6. Step 6: Final answer
   x = 1,384.39