Finding the Third Proportional to 28,419 and 42,629

Step by Step Solution

1. Step 1: Write the proportion equation
   28,419 : 42,629 = 42,629 : x
2. Step 2: Convert to fraction form
   28,419/42,629 = 42,629/x
3. Step 3: Cross multiply
   28,419x = 42,629 × 42,629
4. Step 4: Simplify right side
   28,419x = 1,817,231,641
5. Step 5: Solve for x
   x = 1,817,231,641/28,419
6. Step 6: Final answer
   x = 63,944.25