Finding the Fourth Proportional to 12,274.77, 18,414.20 and 4,879.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,274.77 : 18,414.20 = 4,879.31 : x
2. Step 2: Convert to fraction form
   12,274.77/18,414.20 = 4,879.31/x
3. Step 3: Cross multiply
   12,274.77x = 18,414.20 × 4,879.31
4. Step 4: Simplify right side
   12,274.77x = 89,848,510.33
5. Step 5: Solve for x
   x = 89,848,510.33/12,274.77
6. Step 6: Final answer
   x = 7,319.77