Finding the Fourth Proportional to 42,288.70, 63,405.46 and 13,822.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,288.70 : 63,405.46 = 13,822.15 : x
2. Step 2: Convert to fraction form
   42,288.70/63,405.46 = 13,822.15/x
3. Step 3: Cross multiply
   42,288.70x = 63,405.46 × 13,822.15
4. Step 4: Simplify right side
   42,288.70x = 876,399,778.94
5. Step 5: Solve for x
   x = 876,399,778.94/42,288.70
6. Step 6: Final answer
   x = 20,724.21