Finding the Fourth Proportional to 123,518.15, 170,456.39 and 72,531.48

Step by Step Solution

1. Step 1: Write the proportion equation
   123,518.15 : 170,456.39 = 72,531.48 : x
2. Step 2: Convert to fraction form
   123,518.15/170,456.39 = 72,531.48/x
3. Step 3: Cross multiply
   123,518.15x = 170,456.39 × 72,531.48
4. Step 4: Simplify right side
   123,518.15x = 12,363,453,879.50
5. Step 5: Solve for x
   x = 12,363,453,879.50/123,518.15
6. Step 6: Final answer
   x = 100,094.23