Finding the Fourth Proportional to 9,155.66, 13,732.71 and 2,915.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.66 : 13,732.71 = 2,915.42 : x
2. Step 2: Convert to fraction form
   9,155.66/13,732.71 = 2,915.42/x
3. Step 3: Cross multiply
   9,155.66x = 13,732.71 × 2,915.42
4. Step 4: Simplify right side
   9,155.66x = 40,036,548.72
5. Step 5: Solve for x
   x = 40,036,548.72/9,155.66
6. Step 6: Final answer
   x = 4,372.88