Finding the Fourth Proportional to 42,616.89, 63,954.50 and 21,854.97

Step by Step Solution

1. Step 1: Write the proportion equation
   42,616.89 : 63,954.50 = 21,854.97 : x
2. Step 2: Convert to fraction form
   42,616.89/63,954.50 = 21,854.97/x
3. Step 3: Cross multiply
   42,616.89x = 63,954.50 × 21,854.97
4. Step 4: Simplify right side
   42,616.89x = 1,397,723,569.59
5. Step 5: Solve for x
   x = 1,397,723,569.59/42,616.89
6. Step 6: Final answer
   x = 32,797.41