Finding the Fourth Proportional to 13,116.49, 18,100.86 and 7,148.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.49 : 18,100.86 = 7,148.16 : x
2. Step 2: Convert to fraction form
   13,116.49/18,100.86 = 7,148.16/x
3. Step 3: Cross multiply
   13,116.49x = 18,100.86 × 7,148.16
4. Step 4: Simplify right side
   13,116.49x = 129,387,836.94
5. Step 5: Solve for x
   x = 129,387,836.94/13,116.49
6. Step 6: Final answer
   x = 9,864.52