Finding the Fourth Proportional to 39,930.72, 55,105.76 and 22,026.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,930.72 : 55,105.76 = 22,026.72 : x
2. Step 2: Convert to fraction form
   39,930.72/55,105.76 = 22,026.72/x
3. Step 3: Cross multiply
   39,930.72x = 55,105.76 × 22,026.72
4. Step 4: Simplify right side
   39,930.72x = 1,213,799,145.91
5. Step 5: Solve for x
   x = 1,213,799,145.91/39,930.72
6. Step 6: Final answer
   x = 30,397.63