Finding the Fourth Proportional to 13,096.66, 18,073.12 and 7,128.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.66 : 18,073.12 = 7,128.43 : x
2. Step 2: Convert to fraction form
   13,096.66/18,073.12 = 7,128.43/x
3. Step 3: Cross multiply
   13,096.66x = 18,073.12 × 7,128.43
4. Step 4: Simplify right side
   13,096.66x = 128,832,970.80
5. Step 5: Solve for x
   x = 128,832,970.80/13,096.66
6. Step 6: Final answer
   x = 9,837.09