Finding the Fourth Proportional to 1,164.31, 1,744.07 and 615.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.31 : 1,744.07 = 615.33 : x
2. Step 2: Convert to fraction form
   1,164.31/1,744.07 = 615.33/x
3. Step 3: Cross multiply
   1,164.31x = 1,744.07 × 615.33
4. Step 4: Simplify right side
   1,164.31x = 1,073,175.52
5. Step 5: Solve for x
   x = 1,073,175.52/1,164.31
6. Step 6: Final answer
   x = 921.73