Finding the Fourth Proportional to 80,105.63, 120,176.67 and 42,645.97

Step by Step Solution

1. Step 1: Write the proportion equation
   80,105.63 : 120,176.67 = 42,645.97 : x
2. Step 2: Convert to fraction form
   80,105.63/120,176.67 = 42,645.97/x
3. Step 3: Cross multiply
   80,105.63x = 120,176.67 × 42,645.97
4. Step 4: Simplify right side
   80,105.63x = 5,125,050,663.52
5. Step 5: Solve for x
   x = 5,125,050,663.52/80,105.63
6. Step 6: Final answer
   x = 63,978.66