Finding the Fourth Proportional to 13,116.50, 18,100.24 and 7,148.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.50 : 18,100.24 = 7,148.04 : x
2. Step 2: Convert to fraction form
   13,116.50/18,100.24 = 7,148.04/x
3. Step 3: Cross multiply
   13,116.50x = 18,100.24 × 7,148.04
4. Step 4: Simplify right side
   13,116.50x = 129,381,176.41
5. Step 5: Solve for x
   x = 129,381,176.41/13,116.50
6. Step 6: Final answer
   x = 9,864.00