Finding the Fourth Proportional to 12,942.32, 17,861.04 and 7,278.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.32 : 17,861.04 = 7,278.85 : x
2. Step 2: Convert to fraction form
   12,942.32/17,861.04 = 7,278.85/x
3. Step 3: Cross multiply
   12,942.32x = 17,861.04 × 7,278.85
4. Step 4: Simplify right side
   12,942.32x = 130,007,831.00
5. Step 5: Solve for x
   x = 130,007,831.00/12,942.32
6. Step 6: Final answer
   x = 10,045.17