Finding the Fourth Proportional to 1,141.52, 1,575.29 and 617.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.52 : 1,575.29 = 617.55 : x
2. Step 2: Convert to fraction form
   1,141.52/1,575.29 = 617.55/x
3. Step 3: Cross multiply
   1,141.52x = 1,575.29 × 617.55
4. Step 4: Simplify right side
   1,141.52x = 972,812.50
5. Step 5: Solve for x
   x = 972,812.50/1,141.52
6. Step 6: Final answer
   x = 852.21