Finding the Fourth Proportional to 42,419.15, 63,628.89 and 14,339.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,419.15 : 63,628.89 = 14,339.42 : x
2. Step 2: Convert to fraction form
   42,419.15/63,628.89 = 14,339.42/x
3. Step 3: Cross multiply
   42,419.15x = 63,628.89 × 14,339.42
4. Step 4: Simplify right side
   42,419.15x = 912,401,377.84
5. Step 5: Solve for x
   x = 912,401,377.84/42,419.15
6. Step 6: Final answer
   x = 21,509.19