Finding the Fourth Proportional to 30,545.42, 42,178.34 and 22,978.62

Step by Step Solution

1. Step 1: Write the proportion equation
   30,545.42 : 42,178.34 = 22,978.62 : x
2. Step 2: Convert to fraction form
   30,545.42/42,178.34 = 22,978.62/x
3. Step 3: Cross multiply
   30,545.42x = 42,178.34 × 22,978.62
4. Step 4: Simplify right side
   30,545.42x = 969,200,104.54
5. Step 5: Solve for x
   x = 969,200,104.54/30,545.42
6. Step 6: Final answer
   x = 31,729.81