Finding the Fourth Proportional to 131,982.79, 198,105.99 and 72,846.31

Step by Step Solution

1. Step 1: Write the proportion equation
   131,982.79 : 198,105.99 = 72,846.31 : x
2. Step 2: Convert to fraction form
   131,982.79/198,105.99 = 72,846.31/x
3. Step 3: Cross multiply
   131,982.79x = 198,105.99 × 72,846.31
4. Step 4: Simplify right side
   131,982.79x = 14,431,290,360.40
5. Step 5: Solve for x
   x = 14,431,290,360.40/131,982.79
6. Step 6: Final answer
   x = 109,342.21