Finding the Fourth Proportional to 131,479, 197,120.04 and 42,679.48

Step by Step Solution

1. Step 1: Write the proportion equation
   131,479 : 197,120.04 = 42,679.48 : x
2. Step 2: Convert to fraction form
   131,479/197,120.04 = 42,679.48/x
3. Step 3: Cross multiply
   131,479x = 197,120.04 × 42,679.48
4. Step 4: Simplify right side
   131,479x = 8,412,980,804.78
5. Step 5: Solve for x
   x = 8,412,980,804.78/131,479
6. Step 6: Final answer
   x = 63,987.26