Finding the Fourth Proportional to 123,725.96, 170,745.60 and 72,729.33

Step by Step Solution

1. Step 1: Write the proportion equation
   123,725.96 : 170,745.60 = 72,729.33 : x
2. Step 2: Convert to fraction form
   123,725.96/170,745.60 = 72,729.33/x
3. Step 3: Cross multiply
   123,725.96x = 170,745.60 × 72,729.33
4. Step 4: Simplify right side
   123,725.96x = 12,418,213,088.45
5. Step 5: Solve for x
   x = 12,418,213,088.45/123,725.96
6. Step 6: Final answer
   x = 100,368.70