Finding the Third Proportional to 28,528 and 42,879

Step by Step Solution

1. Step 1: Write the proportion equation
   28,528 : 42,879 = 42,879 : x
2. Step 2: Convert to fraction form
   28,528/42,879 = 42,879/x
3. Step 3: Cross multiply
   28,528x = 42,879 × 42,879
4. Step 4: Simplify right side
   28,528x = 1,838,608,641
5. Step 5: Solve for x
   x = 1,838,608,641/28,528
6. Step 6: Final answer
   x = 64,449.27