Finding the Fourth Proportional to 1,061.20, 1,592.82 and 575.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.20 : 1,592.82 = 575.28 : x
2. Step 2: Convert to fraction form
   1,061.20/1,592.82 = 575.28/x
3. Step 3: Cross multiply
   1,061.20x = 1,592.82 × 575.28
4. Step 4: Simplify right side
   1,061.20x = 916,317.49
5. Step 5: Solve for x
   x = 916,317.49/1,061.20
6. Step 6: Final answer
   x = 863.47