Finding the Fourth Proportional to 10,128.38, 15,191.42 and 2,732.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.38 : 15,191.42 = 2,732.40 : x
2. Step 2: Convert to fraction form
   10,128.38/15,191.42 = 2,732.40/x
3. Step 3: Cross multiply
   10,128.38x = 15,191.42 × 2,732.40
4. Step 4: Simplify right side
   10,128.38x = 41,509,022.35
5. Step 5: Solve for x
   x = 41,509,022.35/10,128.38
6. Step 6: Final answer
   x = 4,098.29