Finding the Third Proportional to 28,658 and 63,128

Step by Step Solution

1. Step 1: Write the proportion equation
   28,658 : 63,128 = 63,128 : x
2. Step 2: Convert to fraction form
   28,658/63,128 = 63,128/x
3. Step 3: Cross multiply
   28,658x = 63,128 × 63,128
4. Step 4: Simplify right side
   28,658x = 3,985,144,384
5. Step 5: Solve for x
   x = 3,985,144,384/28,658
6. Step 6: Final answer
   x = 139,058.71