Finding the Fourth Proportional to 42,081.79, 63,078.37 and 13,994.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,081.79 : 63,078.37 = 13,994.30 : x
2. Step 2: Convert to fraction form
   42,081.79/63,078.37 = 13,994.30/x
3. Step 3: Cross multiply
   42,081.79x = 63,078.37 × 13,994.30
4. Step 4: Simplify right side
   42,081.79x = 882,737,633.29
5. Step 5: Solve for x
   x = 882,737,633.29/42,081.79
6. Step 6: Final answer
   x = 20,976.71