Finding the Fourth Proportional to 1,061.96, 1,591.10 and 575.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.96 : 1,591.10 = 575.35 : x
2. Step 2: Convert to fraction form
   1,061.96/1,591.10 = 575.35/x
3. Step 3: Cross multiply
   1,061.96x = 1,591.10 × 575.35
4. Step 4: Simplify right side
   1,061.96x = 915,440.82
5. Step 5: Solve for x
   x = 915,440.82/1,061.96
6. Step 6: Final answer
   x = 862.03