Finding the Fourth Proportional to 13,116.59, 18,100.43 and 7,148.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.59 : 18,100.43 = 7,148.14 : x
2. Step 2: Convert to fraction form
   13,116.59/18,100.43 = 7,148.14/x
3. Step 3: Cross multiply
   13,116.59x = 18,100.43 × 7,148.14
4. Step 4: Simplify right side
   13,116.59x = 129,384,380.32
5. Step 5: Solve for x
   x = 129,384,380.32/13,116.59
6. Step 6: Final answer
   x = 9,864.18