Finding the Fourth Proportional to 1,615.52, 2,229.31 and 907.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.52 : 2,229.31 = 907.38 : x
2. Step 2: Convert to fraction form
   1,615.52/2,229.31 = 907.38/x
3. Step 3: Cross multiply
   1,615.52x = 2,229.31 × 907.38
4. Step 4: Simplify right side
   1,615.52x = 2,022,831.31
5. Step 5: Solve for x
   x = 2,022,831.31/1,615.52
6. Step 6: Final answer
   x = 1,252.12