Finding the Third Proportional to 54,338 and 80,931

Step by Step Solution

1. Step 1: Write the proportion equation
   54,338 : 80,931 = 80,931 : x
2. Step 2: Convert to fraction form
   54,338/80,931 = 80,931/x
3. Step 3: Cross multiply
   54,338x = 80,931 × 80,931
4. Step 4: Simplify right side
   54,338x = 6,549,826,761
5. Step 5: Solve for x
   x = 6,549,826,761/54,338
6. Step 6: Final answer
   x = 120,538.61