Finding the Fourth Proportional to 13,124.94, 18,112.59 and 7,156.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.94 : 18,112.59 = 7,156.71 : x
2. Step 2: Convert to fraction form
   13,124.94/18,112.59 = 7,156.71/x
3. Step 3: Cross multiply
   13,124.94x = 18,112.59 × 7,156.71
4. Step 4: Simplify right side
   13,124.94x = 129,626,553.98
5. Step 5: Solve for x
   x = 129,626,553.98/13,124.94
6. Step 6: Final answer
   x = 9,876.35