Finding the Fourth Proportional to 12,111.92, 18,162.72 and 4,614.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.92 : 18,162.72 = 4,614.20 : x
2. Step 2: Convert to fraction form
   12,111.92/18,162.72 = 4,614.20/x
3. Step 3: Cross multiply
   12,111.92x = 18,162.72 × 4,614.20
4. Step 4: Simplify right side
   12,111.92x = 83,806,422.62
5. Step 5: Solve for x
   x = 83,806,422.62/12,111.92
6. Step 6: Final answer
   x = 6,919.33