Finding the Third Proportional to 42,617.81 and 66,855.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,617.81 : 66,855.38 = 66,855.38 : x
2. Step 2: Convert to fraction form
   42,617.81/66,855.38 = 66,855.38/x
3. Step 3: Cross multiply
   42,617.81x = 66,855.38 × 66,855.38
4. Step 4: Simplify right side
   42,617.81x = 4,469,641,166.39
5. Step 5: Solve for x
   x = 4,469,641,166.39/42,617.81
6. Step 6: Final answer
   x = 104,877.30