Finding the Third Proportional to 28,818 and 63,189

Step by Step Solution

1. Step 1: Write the proportion equation
   28,818 : 63,189 = 63,189 : x
2. Step 2: Convert to fraction form
   28,818/63,189 = 63,189/x
3. Step 3: Cross multiply
   28,818x = 63,189 × 63,189
4. Step 4: Simplify right side
   28,818x = 3,992,849,721
5. Step 5: Solve for x
   x = 3,992,849,721/28,818
6. Step 6: Final answer
   x = 138,554.02