Finding the Fourth Proportional to 131,790.30, 181,870.71 and 71,361.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131,790.30 : 181,870.71 = 71,361.42 : x
2. Step 2: Convert to fraction form
   131,790.30/181,870.71 = 71,361.42/x
3. Step 3: Cross multiply
   131,790.30x = 181,870.71 × 71,361.42
4. Step 4: Simplify right side
   131,790.30x = 12,978,552,122.01
5. Step 5: Solve for x
   x = 12,978,552,122.01/131,790.30
6. Step 6: Final answer
   x = 98,478.81