Finding the Fourth Proportional to 72,223.50, 99,682.20 and 48,391.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,223.50 : 99,682.20 = 48,391.74 : x
2. Step 2: Convert to fraction form
   72,223.50/99,682.20 = 48,391.74/x
3. Step 3: Cross multiply
   72,223.50x = 99,682.20 × 48,391.74
4. Step 4: Simplify right side
   72,223.50x = 4,823,795,105.03
5. Step 5: Solve for x
   x = 4,823,795,105.03/72,223.50
6. Step 6: Final answer
   x = 66,789.83