Finding the Fourth Proportional to 12,636.71, 17,439.51 and 7,331.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,636.71 : 17,439.51 = 7,331.52 : x
2. Step 2: Convert to fraction form
   12,636.71/17,439.51 = 7,331.52/x
3. Step 3: Cross multiply
   12,636.71x = 17,439.51 × 7,331.52
4. Step 4: Simplify right side
   12,636.71x = 127,858,079.70
5. Step 5: Solve for x
   x = 127,858,079.70/12,636.71
6. Step 6: Final answer
   x = 10,117.99