Finding the Third Proportional to 54,058 and 80,870

Step by Step Solution

1. Step 1: Write the proportion equation
   54,058 : 80,870 = 80,870 : x
2. Step 2: Convert to fraction form
   54,058/80,870 = 80,870/x
3. Step 3: Cross multiply
   54,058x = 80,870 × 80,870
4. Step 4: Simplify right side
   54,058x = 6,539,956,900
5. Step 5: Solve for x
   x = 6,539,956,900/54,058
6. Step 6: Final answer
   x = 120,980.37