Finding the Fourth Proportional to 42,042.88, 63,064.20 and 13,965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,042.88 : 63,064.20 = 13,965.10 : x
2. Step 2: Convert to fraction form
   42,042.88/63,064.20 = 13,965.10/x
3. Step 3: Cross multiply
   42,042.88x = 63,064.20 × 13,965.10
4. Step 4: Simplify right side
   42,042.88x = 880,697,859.42
5. Step 5: Solve for x
   x = 880,697,859.42/42,042.88
6. Step 6: Final answer
   x = 20,947.61