Finding the Fourth Proportional to 1,061.30, 1,592.26 and 540.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.30 : 1,592.26 = 540.88 : x
2. Step 2: Convert to fraction form
   1,061.30/1,592.26 = 540.88/x
3. Step 3: Cross multiply
   1,061.30x = 1,592.26 × 540.88
4. Step 4: Simplify right side
   1,061.30x = 861,216.26
5. Step 5: Solve for x
   x = 861,216.26/1,061.30
6. Step 6: Final answer
   x = 811.47