Finding the Fourth Proportional to 120,945.18, 181,434.20 and 42,049.20

Step by Step Solution

1. Step 1: Write the proportion equation
   120,945.18 : 181,434.20 = 42,049.20 : x
2. Step 2: Convert to fraction form
   120,945.18/181,434.20 = 42,049.20/x
3. Step 3: Cross multiply
   120,945.18x = 181,434.20 × 42,049.20
4. Step 4: Simplify right side
   120,945.18x = 7,629,162,752.39
5. Step 5: Solve for x
   x = 7,629,162,752.39/120,945.18
6. Step 6: Final answer
   x = 63,079.51