Finding the Fourth Proportional to 39,912.50, 55,079.61 and 22,008.15

Step by Step Solution

1. Step 1: Write the proportion equation
   39,912.50 : 55,079.61 = 22,008.15 : x
2. Step 2: Convert to fraction form
   39,912.50/55,079.61 = 22,008.15/x
3. Step 3: Cross multiply
   39,912.50x = 55,079.61 × 22,008.15
4. Step 4: Simplify right side
   39,912.50x = 1,212,200,318.82
5. Step 5: Solve for x
   x = 1,212,200,318.82/39,912.50
6. Step 6: Final answer
   x = 30,371.45