Finding the Fourth Proportional to 42,022.92, 63,015.90 and 12,443.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,022.92 : 63,015.90 = 12,443.04 : x
2. Step 2: Convert to fraction form
   42,022.92/63,015.90 = 12,443.04/x
3. Step 3: Cross multiply
   42,022.92x = 63,015.90 × 12,443.04
4. Step 4: Simplify right side
   42,022.92x = 784,109,364.34
5. Step 5: Solve for x
   x = 784,109,364.34/42,022.92
6. Step 6: Final answer
   x = 18,659.09