Finding the Fourth Proportional to 42,067.30, 63,087.29 and 13,979.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,067.30 : 63,087.29 = 13,979.81 : x
2. Step 2: Convert to fraction form
   42,067.30/63,087.29 = 13,979.81/x
3. Step 3: Cross multiply
   42,067.30x = 63,087.29 × 13,979.81
4. Step 4: Simplify right side
   42,067.30x = 881,948,327.61
5. Step 5: Solve for x
   x = 881,948,327.61/42,067.30
6. Step 6: Final answer
   x = 20,965.18