Finding the Fourth Proportional to 80,378.56, 120,474.42 and 30,426.76

Step by Step Solution

1. Step 1: Write the proportion equation
   80,378.56 : 120,474.42 = 30,426.76 : x
2. Step 2: Convert to fraction form
   80,378.56/120,474.42 = 30,426.76/x
3. Step 3: Cross multiply
   80,378.56x = 120,474.42 × 30,426.76
4. Step 4: Simplify right side
   80,378.56x = 3,665,646,263.48
5. Step 5: Solve for x
   x = 3,665,646,263.48/80,378.56
6. Step 6: Final answer
   x = 45,604.78