Finding the Third Proportional to 57,671 and 89,505

Step by Step Solution

1. Step 1: Write the proportion equation
   57,671 : 89,505 = 89,505 : x
2. Step 2: Convert to fraction form
   57,671/89,505 = 89,505/x
3. Step 3: Cross multiply
   57,671x = 89,505 × 89,505
4. Step 4: Simplify right side
   57,671x = 8,011,145,025
5. Step 5: Solve for x
   x = 8,011,145,025/57,671
6. Step 6: Final answer
   x = 138,911.15