Finding the Fourth Proportional to 1,615.30, 2,229.03 and 907.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.30 : 2,229.03 = 907.15 : x
2. Step 2: Convert to fraction form
   1,615.30/2,229.03 = 907.15/x
3. Step 3: Cross multiply
   1,615.30x = 2,229.03 × 907.15
4. Step 4: Simplify right side
   1,615.30x = 2,022,064.56
5. Step 5: Solve for x
   x = 2,022,064.56/1,615.30
6. Step 6: Final answer
   x = 1,251.82