Finding the Fourth Proportional to 83,621.72, 115,401.46 and 47,811.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83,621.72 : 115,401.46 = 47,811.72 : x
2. Step 2: Convert to fraction form
   83,621.72/115,401.46 = 47,811.72/x
3. Step 3: Cross multiply
   83,621.72x = 115,401.46 × 47,811.72
4. Step 4: Simplify right side
   83,621.72x = 5,517,542,046.85
5. Step 5: Solve for x
   x = 5,517,542,046.85/83,621.72
6. Step 6: Final answer
   x = 65,982.17