Finding the Third Proportional to 42,631 and 64,540

Step by Step Solution

1. Step 1: Write the proportion equation
   42,631 : 64,540 = 64,540 : x
2. Step 2: Convert to fraction form
   42,631/64,540 = 64,540/x
3. Step 3: Cross multiply
   42,631x = 64,540 × 64,540
4. Step 4: Simplify right side
   42,631x = 4,165,411,600
5. Step 5: Solve for x
   x = 4,165,411,600/42,631
6. Step 6: Final answer
   x = 97,708.51