Finding the Fourth Proportional to 42,029.18, 63,043.49 and 12,447.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,029.18 : 63,043.49 = 12,447.18 : x
2. Step 2: Convert to fraction form
   42,029.18/63,043.49 = 12,447.18/x
3. Step 3: Cross multiply
   42,029.18x = 63,043.49 × 12,447.18
4. Step 4: Simplify right side
   42,029.18x = 784,713,667.86
5. Step 5: Solve for x
   x = 784,713,667.86/42,029.18
6. Step 6: Final answer
   x = 18,670.69