Finding the Fourth Proportional to 10,492.38, 15,744.06 and 9,887.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,492.38 : 15,744.06 = 9,887.31 : x
2. Step 2: Convert to fraction form
   10,492.38/15,744.06 = 9,887.31/x
3. Step 3: Cross multiply
   10,492.38x = 15,744.06 × 9,887.31
4. Step 4: Simplify right side
   10,492.38x = 155,666,401.88
5. Step 5: Solve for x
   x = 155,666,401.88/10,492.38
6. Step 6: Final answer
   x = 14,836.14