Finding the Fourth Proportional to 80,722.56, 111,379.68 and 48,892.80

Step by Step Solution

1. Step 1: Write the proportion equation
   80,722.56 : 111,379.68 = 48,892.80 : x
2. Step 2: Convert to fraction form
   80,722.56/111,379.68 = 48,892.80/x
3. Step 3: Cross multiply
   80,722.56x = 111,379.68 × 48,892.80
4. Step 4: Simplify right side
   80,722.56x = 5,445,664,418.30
5. Step 5: Solve for x
   x = 5,445,664,418.30/80,722.56
6. Step 6: Final answer
   x = 67,461.49