Finding the Fourth Proportional to 131,870.20, 181,980.67 and 71,442.38

Step by Step Solution

1. Step 1: Write the proportion equation
   131,870.20 : 181,980.67 = 71,442.38 : x
2. Step 2: Convert to fraction form
   131,870.20/181,980.67 = 71,442.38/x
3. Step 3: Cross multiply
   131,870.20x = 181,980.67 × 71,442.38
4. Step 4: Simplify right side
   131,870.20x = 13,001,132,178.79
5. Step 5: Solve for x
   x = 13,001,132,178.79/131,870.20
6. Step 6: Final answer
   x = 98,590.37