Finding the Fourth Proportional to 131,870.48, 181,980.99 and 71,442.63

Step by Step Solution

1. Step 1: Write the proportion equation
   131,870.48 : 181,980.99 = 71,442.63 : x
2. Step 2: Convert to fraction form
   131,870.48/181,980.99 = 71,442.63/x
3. Step 3: Cross multiply
   131,870.48x = 181,980.99 × 71,442.63
4. Step 4: Simplify right side
   131,870.48x = 13,001,200,535.60
5. Step 5: Solve for x
   x = 13,001,200,535.60/131,870.48
6. Step 6: Final answer
   x = 98,590.69