Finding the Third Proportional to 17,617.50 and 42,879.38

Step by Step Solution

1. Step 1: Write the proportion equation
   17,617.50 : 42,879.38 = 42,879.38 : x
2. Step 2: Convert to fraction form
   17,617.50/42,879.38 = 42,879.38/x
3. Step 3: Cross multiply
   17,617.50x = 42,879.38 × 42,879.38
4. Step 4: Simplify right side
   17,617.50x = 1,838,640,800.39
5. Step 5: Solve for x
   x = 1,838,640,800.39/17,617.50
6. Step 6: Final answer
   x = 104,364.46