Finding the Third Proportional to 28,418 and 42,628

Step by Step Solution

1. Step 1: Write the proportion equation
   28,418 : 42,628 = 42,628 : x
2. Step 2: Convert to fraction form
   28,418/42,628 = 42,628/x
3. Step 3: Cross multiply
   28,418x = 42,628 × 42,628
4. Step 4: Simplify right side
   28,418x = 1,817,146,384
5. Step 5: Solve for x
   x = 1,817,146,384/28,418
6. Step 6: Final answer
   x = 63,943.50