Finding the Fourth Proportional to 13,116.76, 18,100.89 and 7,148.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,116.76 : 18,100.89 = 7,148.48 : x
2. Step 2: Convert to fraction form
   13,116.76/18,100.89 = 7,148.48/x
3. Step 3: Cross multiply
   13,116.76x = 18,100.89 × 7,148.48
4. Step 4: Simplify right side
   13,116.76x = 129,393,759.64
5. Step 5: Solve for x
   x = 129,393,759.64/13,116.76
6. Step 6: Final answer
   x = 9,864.77