Finding the Fourth Proportional to 42,002.24, 62,981.40 and 12,416.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,002.24 : 62,981.40 = 12,416.08 : x
2. Step 2: Convert to fraction form
   42,002.24/62,981.40 = 12,416.08/x
3. Step 3: Cross multiply
   42,002.24x = 62,981.40 × 12,416.08
4. Step 4: Simplify right side
   42,002.24x = 781,982,100.91
5. Step 5: Solve for x
   x = 781,982,100.91/42,002.24
6. Step 6: Final answer
   x = 18,617.63