Finding the Fourth Proportional to 1,475.15, 2,035.60 and 915.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,475.15 : 2,035.60 = 915.61 : x
2. Step 2: Convert to fraction form
   1,475.15/2,035.60 = 915.61/x
3. Step 3: Cross multiply
   1,475.15x = 2,035.60 × 915.61
4. Step 4: Simplify right side
   1,475.15x = 1,863,815.72
5. Step 5: Solve for x
   x = 1,863,815.72/1,475.15
6. Step 6: Final answer
   x = 1,263.48