Finding the Fourth Proportional to 39,978.78, 55,170.46 and 22,073.62

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978.78 : 55,170.46 = 22,073.62 : x
2. Step 2: Convert to fraction form
   39,978.78/55,170.46 = 22,073.62/x
3. Step 3: Cross multiply
   39,978.78x = 55,170.46 × 22,073.62
4. Step 4: Simplify right side
   39,978.78x = 1,217,811,769.27
5. Step 5: Solve for x
   x = 1,217,811,769.27/39,978.78
6. Step 6: Final answer
   x = 30,461.45