Finding the Fourth Proportional to 42,685.43, 64,028.05 and 14,605.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,685.43 : 64,028.05 = 14,605.73 : x
2. Step 2: Convert to fraction form
   42,685.43/64,028.05 = 14,605.73/x
3. Step 3: Cross multiply
   42,685.43x = 64,028.05 × 14,605.73
4. Step 4: Simplify right side
   42,685.43x = 935,176,410.73
5. Step 5: Solve for x
   x = 935,176,410.73/42,685.43
6. Step 6: Final answer
   x = 21,908.56