Finding the Fourth Proportional to 12,215.88, 18,323.69 and 2,981.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,215.88 : 18,323.69 = 2,981.88 : x
2. Step 2: Convert to fraction form
   12,215.88/18,323.69 = 2,981.88/x
3. Step 3: Cross multiply
   12,215.88x = 18,323.69 × 2,981.88
4. Step 4: Simplify right side
   12,215.88x = 54,639,029.83
5. Step 5: Solve for x
   x = 54,639,029.83/12,215.88
6. Step 6: Final answer
   x = 4,472.79