Finding the Fourth Proportional to 42,009.02, 63,025.41 and 12,426.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,009.02 : 63,025.41 = 12,426.74 : x
2. Step 2: Convert to fraction form
   42,009.02/63,025.41 = 12,426.74/x
3. Step 3: Cross multiply
   42,009.02x = 63,025.41 × 12,426.74
4. Step 4: Simplify right side
   42,009.02x = 783,200,383.46
5. Step 5: Solve for x
   x = 783,200,383.46/42,009.02
6. Step 6: Final answer
   x = 18,643.62