Finding the Fourth Proportional to 1,553.28, 2,142.88 and 932.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.28 : 2,142.88 = 932.16 : x
2. Step 2: Convert to fraction form
   1,553.28/2,142.88 = 932.16/x
3. Step 3: Cross multiply
   1,553.28x = 2,142.88 × 932.16
4. Step 4: Simplify right side
   1,553.28x = 1,997,507.02
5. Step 5: Solve for x
   x = 1,997,507.02/1,553.28
6. Step 6: Final answer
   x = 1,285.99