Finding the Fourth Proportional to 123,650.89, 170,663.09 and 72,680.09

Step by Step Solution

1. Step 1: Write the proportion equation
   123,650.89 : 170,663.09 = 72,680.09 : x
2. Step 2: Convert to fraction form
   123,650.89/170,663.09 = 72,680.09/x
3. Step 3: Cross multiply
   123,650.89x = 170,663.09 × 72,680.09
4. Step 4: Simplify right side
   123,650.89x = 12,403,807,524.16
5. Step 5: Solve for x
   x = 12,403,807,524.16/123,650.89
6. Step 6: Final answer
   x = 100,313.13