Finding the Fourth Proportional to 81,315.12, 112,216.55 and 49,049.58

Step by Step Solution

1. Step 1: Write the proportion equation
   81,315.12 : 112,216.55 = 49,049.58 : x
2. Step 2: Convert to fraction form
   81,315.12/112,216.55 = 49,049.58/x
3. Step 3: Cross multiply
   81,315.12x = 112,216.55 × 49,049.58
4. Step 4: Simplify right side
   81,315.12x = 5,504,174,401.30
5. Step 5: Solve for x
   x = 5,504,174,401.30/81,315.12
6. Step 6: Final answer
   x = 67,689.43