Finding the Third Proportional to 54,158 and 83,696

Step by Step Solution

1. Step 1: Write the proportion equation
   54,158 : 83,696 = 83,696 : x
2. Step 2: Convert to fraction form
   54,158/83,696 = 83,696/x
3. Step 3: Cross multiply
   54,158x = 83,696 × 83,696
4. Step 4: Simplify right side
   54,158x = 7,005,020,416
5. Step 5: Solve for x
   x = 7,005,020,416/54,158
6. Step 6: Final answer
   x = 129,344.15