Finding the Fourth Proportional to 42,674.92, 63,958.62 and 20,470.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,674.92 : 63,958.62 = 20,470.12 : x
2. Step 2: Convert to fraction form
   42,674.92/63,958.62 = 20,470.12/x
3. Step 3: Cross multiply
   42,674.92x = 63,958.62 × 20,470.12
4. Step 4: Simplify right side
   42,674.92x = 1,309,240,626.43
5. Step 5: Solve for x
   x = 1,309,240,626.43/42,674.92
6. Step 6: Final answer
   x = 30,679.39