Finding the Fourth Proportional to 13,101.62, 18,079.76 and 7,133.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,101.62 : 18,079.76 = 7,133.15 : x
2. Step 2: Convert to fraction form
   13,101.62/18,079.76 = 7,133.15/x
3. Step 3: Cross multiply
   13,101.62x = 18,079.76 × 7,133.15
4. Step 4: Simplify right side
   13,101.62x = 128,965,561.25
5. Step 5: Solve for x
   x = 128,965,561.25/13,101.62
6. Step 6: Final answer
   x = 9,843.49