Finding the Fourth Proportional to 1,141.58, 1,575.39 and 617.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.58 : 1,575.39 = 617.61 : x
2. Step 2: Convert to fraction form
   1,141.58/1,575.39 = 617.61/x
3. Step 3: Cross multiply
   1,141.58x = 1,575.39 × 617.61
4. Step 4: Simplify right side
   1,141.58x = 972,976.62
5. Step 5: Solve for x
   x = 972,976.62/1,141.58
6. Step 6: Final answer
   x = 852.31