Finding the Fourth Proportional to 1,061.91, 1,593.47 and 575.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.91 : 1,593.47 = 575.30 : x
2. Step 2: Convert to fraction form
   1,061.91/1,593.47 = 575.30/x
3. Step 3: Cross multiply
   1,061.91x = 1,593.47 × 575.30
4. Step 4: Simplify right side
   1,061.91x = 916,728.71
5. Step 5: Solve for x
   x = 916,728.71/1,061.91
6. Step 6: Final answer
   x = 863.28