Finding the Third Proportional to 42,417.50 and 65,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,417.50 : 65,618.50 = 65,618.50 : x
2. Step 2: Convert to fraction form
   42,417.50/65,618.50 = 65,618.50/x
3. Step 3: Cross multiply
   42,417.50x = 65,618.50 × 65,618.50
4. Step 4: Simplify right side
   42,417.50x = 4,305,787,542.25
5. Step 5: Solve for x
   x = 4,305,787,542.25/42,417.50
6. Step 6: Final answer
   x = 101,509.70