Finding the Fourth Proportional to 1,060.48, 1,587.52 and 1,042.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.48 : 1,587.52 = 1,042.56 : x
2. Step 2: Convert to fraction form
   1,060.48/1,587.52 = 1,042.56/x
3. Step 3: Cross multiply
   1,060.48x = 1,587.52 × 1,042.56
4. Step 4: Simplify right side
   1,060.48x = 1,655,084.85
5. Step 5: Solve for x
   x = 1,655,084.85/1,060.48
6. Step 6: Final answer
   x = 1,560.69