Finding the Fourth Proportional to 14,931.30, 22,364.55 and 12,339.30

Step by Step Solution

1. Step 1: Write the proportion equation
   14,931.30 : 22,364.55 = 12,339.30 : x
2. Step 2: Convert to fraction form
   14,931.30/22,364.55 = 12,339.30/x
3. Step 3: Cross multiply
   14,931.30x = 22,364.55 × 12,339.30
4. Step 4: Simplify right side
   14,931.30x = 275,962,891.82
5. Step 5: Solve for x
   x = 275,962,891.82/14,931.30
6. Step 6: Final answer
   x = 18,482.17