Finding the Fourth Proportional to 123,725.49, 170,744.96 and 72,728.87

Step by Step Solution

1. Step 1: Write the proportion equation
   123,725.49 : 170,744.96 = 72,728.87 : x
2. Step 2: Convert to fraction form
   123,725.49/170,744.96 = 72,728.87/x
3. Step 3: Cross multiply
   123,725.49x = 170,744.96 × 72,728.87
4. Step 4: Simplify right side
   123,725.49x = 12,418,087,145.27
5. Step 5: Solve for x
   x = 12,418,087,145.27/123,725.49
6. Step 6: Final answer
   x = 100,368.06