Finding the Fourth Proportional to 123,217.57, 170,076.60 and 72,241.37

Step by Step Solution

1. Step 1: Write the proportion equation
   123,217.57 : 170,076.60 = 72,241.37 : x
2. Step 2: Convert to fraction form
   123,217.57/170,076.60 = 72,241.37/x
3. Step 3: Cross multiply
   123,217.57x = 170,076.60 × 72,241.37
4. Step 4: Simplify right side
   123,217.57x = 12,286,565,738.56
5. Step 5: Solve for x
   x = 12,286,565,738.56/123,217.57
6. Step 6: Final answer
   x = 99,714.40