Finding the Fourth Proportional to 42,401.71, 63,604.82 and 12,818.79

Step by Step Solution

1. Step 1: Write the proportion equation
   42,401.71 : 63,604.82 = 12,818.79 : x
2. Step 2: Convert to fraction form
   42,401.71/63,604.82 = 12,818.79/x
3. Step 3: Cross multiply
   42,401.71x = 63,604.82 × 12,818.79
4. Step 4: Simplify right side
   42,401.71x = 815,336,766.47
5. Step 5: Solve for x
   x = 815,336,766.47/42,401.71
6. Step 6: Final answer
   x = 19,228.87