Finding the Fourth Proportional to 123,286.89, 170,081.73 and 72,273.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,286.89 : 170,081.73 = 72,273.72 : x
2. Step 2: Convert to fraction form
   123,286.89/170,081.73 = 72,273.72/x
3. Step 3: Cross multiply
   123,286.89x = 170,081.73 × 72,273.72
4. Step 4: Simplify right side
   123,286.89x = 12,292,439,331.14
5. Step 5: Solve for x
   x = 12,292,439,331.14/123,286.89
6. Step 6: Final answer
   x = 99,705.97