Finding the Fourth Proportional to 13,096.49, 18,073.25 and 7,128.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.49 : 18,073.25 = 7,128.17 : x
2. Step 2: Convert to fraction form
   13,096.49/18,073.25 = 7,128.17/x
3. Step 3: Cross multiply
   13,096.49x = 18,073.25 × 7,128.17
4. Step 4: Simplify right side
   13,096.49x = 128,829,072.45
5. Step 5: Solve for x
   x = 128,829,072.45/13,096.49
6. Step 6: Final answer
   x = 9,836.92