Finding the Third Proportional to 28,890 and 63,443

Step by Step Solution

1. Step 1: Write the proportion equation
   28,890 : 63,443 = 63,443 : x
2. Step 2: Convert to fraction form
   28,890/63,443 = 63,443/x
3. Step 3: Cross multiply
   28,890x = 63,443 × 63,443
4. Step 4: Simplify right side
   28,890x = 4,025,014,249
5. Step 5: Solve for x
   x = 4,025,014,249/28,890
6. Step 6: Final answer
   x = 139,322.06