Finding the Fourth Proportional to 80,503.74, 120,819.39 and 42,579.93

Step by Step Solution

1. Step 1: Write the proportion equation
   80,503.74 : 120,819.39 = 42,579.93 : x
2. Step 2: Convert to fraction form
   80,503.74/120,819.39 = 42,579.93/x
3. Step 3: Cross multiply
   80,503.74x = 120,819.39 × 42,579.93
4. Step 4: Simplify right side
   80,503.74x = 5,144,481,168.84
5. Step 5: Solve for x
   x = 5,144,481,168.84/80,503.74
6. Step 6: Final answer
   x = 63,903.63