Finding the Fourth Proportional to 12,275.74, 18,422.12 and 4,879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,275.74 : 18,422.12 = 4,879.50 : x
2. Step 2: Convert to fraction form
   12,275.74/18,422.12 = 4,879.50/x
3. Step 3: Cross multiply
   12,275.74x = 18,422.12 × 4,879.50
4. Step 4: Simplify right side
   12,275.74x = 89,890,734.54
5. Step 5: Solve for x
   x = 89,890,734.54/12,275.74
6. Step 6: Final answer
   x = 7,322.63