Finding the Fourth Proportional to 13,101.47, 18,079.46 and 7,133.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,101.47 : 18,079.46 = 7,133.16 : x
2. Step 2: Convert to fraction form
   13,101.47/18,079.46 = 7,133.16/x
3. Step 3: Cross multiply
   13,101.47x = 18,079.46 × 7,133.16
4. Step 4: Simplify right side
   13,101.47x = 128,963,680.89
5. Step 5: Solve for x
   x = 128,963,680.89/13,101.47
6. Step 6: Final answer
   x = 9,843.45