Finding the Fourth Proportional to 39,985.28, 55,179.39 and 22,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,985.28 : 55,179.39 = 22,081.50 : x
2. Step 2: Convert to fraction form
   39,985.28/55,179.39 = 22,081.50/x
3. Step 3: Cross multiply
   39,985.28x = 55,179.39 × 22,081.50
4. Step 4: Simplify right side
   39,985.28x = 1,218,443,700.29
5. Step 5: Solve for x
   x = 1,218,443,700.29/39,985.28
6. Step 6: Final answer
   x = 30,472.31