Finding the Fourth Proportional to 42,067.86, 63,113.13 and 13,992.45

Step by Step Solution

1. Step 1: Write the proportion equation
   42,067.86 : 63,113.13 = 13,992.45 : x
2. Step 2: Convert to fraction form
   42,067.86/63,113.13 = 13,992.45/x
3. Step 3: Cross multiply
   42,067.86x = 63,113.13 × 13,992.45
4. Step 4: Simplify right side
   42,067.86x = 883,107,315.87
5. Step 5: Solve for x
   x = 883,107,315.87/42,067.86
6. Step 6: Final answer
   x = 20,992.45