Finding the Fourth Proportional to 30,545.28, 42,178.17 and 22,978.47

Step by Step Solution

1. Step 1: Write the proportion equation
   30,545.28 : 42,178.17 = 22,978.47 : x
2. Step 2: Convert to fraction form
   30,545.28/42,178.17 = 22,978.47/x
3. Step 3: Cross multiply
   30,545.28x = 42,178.17 × 22,978.47
4. Step 4: Simplify right side
   30,545.28x = 969,189,814.00
5. Step 5: Solve for x
   x = 969,189,814.00/30,545.28
6. Step 6: Final answer
   x = 31,729.61