Finding the Fourth Proportional to 131,789.82, 181,870.29 and 71,361.21

Step by Step Solution

1. Step 1: Write the proportion equation
   131,789.82 : 181,870.29 = 71,361.21 : x
2. Step 2: Convert to fraction form
   131,789.82/181,870.29 = 71,361.21/x
3. Step 3: Cross multiply
   131,789.82x = 181,870.29 × 71,361.21
4. Step 4: Simplify right side
   131,789.82x = 12,978,483,957.45
5. Step 5: Solve for x
   x = 12,978,483,957.45/131,789.82
6. Step 6: Final answer
   x = 98,478.65