Finding the Fourth Proportional to 11,492.38, 15,861.20 and 7,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,492.38 : 15,861.20 = 7,018.72 : x
2. Step 2: Convert to fraction form
   11,492.38/15,861.20 = 7,018.72/x
3. Step 3: Cross multiply
   11,492.38x = 15,861.20 × 7,018.72
4. Step 4: Simplify right side
   11,492.38x = 111,325,321.66
5. Step 5: Solve for x
   x = 111,325,321.66/11,492.38
6. Step 6: Final answer
   x = 9,686.88