Finding the Fourth Proportional to 12,086.72, 18,098.96 and 7,160

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.72 : 18,098.96 = 7,160 : x
2. Step 2: Convert to fraction form
   12,086.72/18,098.96 = 7,160/x
3. Step 3: Cross multiply
   12,086.72x = 18,098.96 × 7,160
4. Step 4: Simplify right side
   12,086.72x = 129,588,553.60
5. Step 5: Solve for x
   x = 129,588,553.60/12,086.72
6. Step 6: Final answer
   x = 10,721.56