Finding the Fourth Proportional to 80,105.13, 120,175.92 and 42,645.47

Step by Step Solution

1. Step 1: Write the proportion equation
   80,105.13 : 120,175.92 = 42,645.47 : x
2. Step 2: Convert to fraction form
   80,105.13/120,175.92 = 42,645.47/x
3. Step 3: Cross multiply
   80,105.13x = 120,175.92 × 42,645.47
4. Step 4: Simplify right side
   80,105.13x = 5,124,957,776.98
5. Step 5: Solve for x
   x = 5,124,957,776.98/80,105.13
6. Step 6: Final answer
   x = 63,977.90