Finding the Fourth Proportional to 10,938.57, 15,089.98 and 7,160.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,938.57 : 15,089.98 = 7,160.07 : x
2. Step 2: Convert to fraction form
   10,938.57/15,089.98 = 7,160.07/x
3. Step 3: Cross multiply
   10,938.57x = 15,089.98 × 7,160.07
4. Step 4: Simplify right side
   10,938.57x = 108,045,313.10
5. Step 5: Solve for x
   x = 108,045,313.10/10,938.57
6. Step 6: Final answer
   x = 9,877.46