Finding the Fourth Proportional to 131,648.48, 197,484.72 and 42,879.20

Step by Step Solution

1. Step 1: Write the proportion equation
   131,648.48 : 197,484.72 = 42,879.20 : x
2. Step 2: Convert to fraction form
   131,648.48/197,484.72 = 42,879.20/x
3. Step 3: Cross multiply
   131,648.48x = 197,484.72 × 42,879.20
4. Step 4: Simplify right side
   131,648.48x = 8,467,986,805.82
5. Step 5: Solve for x
   x = 8,467,986,805.82/131,648.48
6. Step 6: Final answer
   x = 64,322.71