Finding the Third Proportional to 42,618 and 64,518

Step by Step Solution

1. Step 1: Write the proportion equation
   42,618 : 64,518 = 64,518 : x
2. Step 2: Convert to fraction form
   42,618/64,518 = 64,518/x
3. Step 3: Cross multiply
   42,618x = 64,518 × 64,518
4. Step 4: Simplify right side
   42,618x = 4,162,572,324
5. Step 5: Solve for x
   x = 4,162,572,324/42,618
6. Step 6: Final answer
   x = 97,671.70