Finding the Fourth Proportional to 123,868.23, 170,908.86 and 72,883.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,868.23 : 170,908.86 = 72,883.20 : x
2. Step 2: Convert to fraction form
   123,868.23/170,908.86 = 72,883.20/x
3. Step 3: Cross multiply
   123,868.23x = 170,908.86 × 72,883.20
4. Step 4: Simplify right side
   123,868.23x = 12,456,384,625.15
5. Step 5: Solve for x
   x = 12,456,384,625.15/123,868.23
6. Step 6: Final answer
   x = 100,561.58