Finding the Fourth Proportional to 39,978.34, 55,172.27 and 22,073.29

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978.34 : 55,172.27 = 22,073.29 : x
2. Step 2: Convert to fraction form
   39,978.34/55,172.27 = 22,073.29/x
3. Step 3: Cross multiply
   39,978.34x = 55,172.27 × 22,073.29
4. Step 4: Simplify right side
   39,978.34x = 1,217,833,515.67
5. Step 5: Solve for x
   x = 1,217,833,515.67/39,978.34
6. Step 6: Final answer
   x = 30,462.33