Finding the Fourth Proportional to 42,401.88, 63,603.63 and 12,817.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,401.88 : 63,603.63 = 12,817.85 : x
2. Step 2: Convert to fraction form
   42,401.88/63,603.63 = 12,817.85/x
3. Step 3: Cross multiply
   42,401.88x = 63,603.63 × 12,817.85
4. Step 4: Simplify right side
   42,401.88x = 815,261,470.78
5. Step 5: Solve for x
   x = 815,261,470.78/42,401.88
6. Step 6: Final answer
   x = 19,227.01