Finding the Third Proportional to 54,168 and 83,711

Step by Step Solution

1. Step 1: Write the proportion equation
   54,168 : 83,711 = 83,711 : x
2. Step 2: Convert to fraction form
   54,168/83,711 = 83,711/x
3. Step 3: Cross multiply
   54,168x = 83,711 × 83,711
4. Step 4: Simplify right side
   54,168x = 7,007,531,521
5. Step 5: Solve for x
   x = 7,007,531,521/54,168
6. Step 6: Final answer
   x = 129,366.63