Finding the Third Proportional to 423,067.50 and 638,181

Step by Step Solution

1. Step 1: Write the proportion equation
   423,067.50 : 638,181 = 638,181 : x
2. Step 2: Convert to fraction form
   423,067.50/638,181 = 638,181/x
3. Step 3: Cross multiply
   423,067.50x = 638,181 × 638,181
4. Step 4: Simplify right side
   423,067.50x = 407,274,988,761
5. Step 5: Solve for x
   x = 407,274,988,761/423,067.50
6. Step 6: Final answer
   x = 962,671.41