Finding the Fourth Proportional to 11,066.72, 15,286.98 and 10,279.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,066.72 : 15,286.98 = 10,279.40 : x
2. Step 2: Convert to fraction form
   11,066.72/15,286.98 = 10,279.40/x
3. Step 3: Cross multiply
   11,066.72x = 15,286.98 × 10,279.40
4. Step 4: Simplify right side
   11,066.72x = 157,140,982.21
5. Step 5: Solve for x
   x = 157,140,982.21/11,066.72
6. Step 6: Final answer
   x = 14,199.42