Finding the Fourth Proportional to 39,978.70, 55,170.83 and 22,073.76

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978.70 : 55,170.83 = 22,073.76 : x
2. Step 2: Convert to fraction form
   39,978.70/55,170.83 = 22,073.76/x
3. Step 3: Cross multiply
   39,978.70x = 55,170.83 × 22,073.76
4. Step 4: Simplify right side
   39,978.70x = 1,217,827,715.61
5. Step 5: Solve for x
   x = 1,217,827,715.61/39,978.70
6. Step 6: Final answer
   x = 30,461.92