Finding the Fourth Proportional to 123,046.56, 169,805.84 and 72,745.12

Step by Step Solution

1. Step 1: Write the proportion equation
   123,046.56 : 169,805.84 = 72,745.12 : x
2. Step 2: Convert to fraction form
   123,046.56/169,805.84 = 72,745.12/x
3. Step 3: Cross multiply
   123,046.56x = 169,805.84 × 72,745.12
4. Step 4: Simplify right side
   123,046.56x = 12,352,546,207.50
5. Step 5: Solve for x
   x = 12,352,546,207.50/123,046.56
6. Step 6: Final answer
   x = 100,389.20