Finding the Fourth Proportional to 13,124.62, 18,111.58 and 7,156.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.62 : 18,111.58 = 7,156.41 : x
2. Step 2: Convert to fraction form
   13,124.62/18,111.58 = 7,156.41/x
3. Step 3: Cross multiply
   13,124.62x = 18,111.58 × 7,156.41
4. Step 4: Simplify right side
   13,124.62x = 129,613,846.67
5. Step 5: Solve for x
   x = 129,613,846.67/13,124.62
6. Step 6: Final answer
   x = 9,875.63