Finding the Fourth Proportional to 12,280.13, 18,404.78 and 5,251.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280.13 : 18,404.78 = 5,251.88 : x
2. Step 2: Convert to fraction form
   12,280.13/18,404.78 = 5,251.88/x
3. Step 3: Cross multiply
   12,280.13x = 18,404.78 × 5,251.88
4. Step 4: Simplify right side
   12,280.13x = 96,659,590.83
5. Step 5: Solve for x
   x = 96,659,590.83/12,280.13
6. Step 6: Final answer
   x = 7,871.22