Finding the Third Proportional to 28,413 and 42,620

Step by Step Solution

1. Step 1: Write the proportion equation
   28,413 : 42,620 = 42,620 : x
2. Step 2: Convert to fraction form
   28,413/42,620 = 42,620/x
3. Step 3: Cross multiply
   28,413x = 42,620 × 42,620
4. Step 4: Simplify right side
   28,413x = 1,816,464,400
5. Step 5: Solve for x
   x = 1,816,464,400/28,413
6. Step 6: Final answer
   x = 63,930.75