Finding the Fourth Proportional to 80,989.61, 111,765.83 and 45,178.70

Step by Step Solution

1. Step 1: Write the proportion equation
   80,989.61 : 111,765.83 = 45,178.70 : x
2. Step 2: Convert to fraction form
   80,989.61/111,765.83 = 45,178.70/x
3. Step 3: Cross multiply
   80,989.61x = 111,765.83 × 45,178.70
4. Step 4: Simplify right side
   80,989.61x = 5,049,434,119.10
5. Step 5: Solve for x
   x = 5,049,434,119.10/80,989.61
6. Step 6: Final answer
   x = 62,346.69