Finding the Third Proportional to 42,945.50 and 66,872

Step by Step Solution

1. Step 1: Write the proportion equation
   42,945.50 : 66,872 = 66,872 : x
2. Step 2: Convert to fraction form
   42,945.50/66,872 = 66,872/x
3. Step 3: Cross multiply
   42,945.50x = 66,872 × 66,872
4. Step 4: Simplify right side
   42,945.50x = 4,471,864,384
5. Step 5: Solve for x
   x = 4,471,864,384/42,945.50
6. Step 6: Final answer
   x = 104,128.82