Finding the Third Proportional to 54,611 and 86,834.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,611 : 86,834.50 = 86,834.50 : x
2. Step 2: Convert to fraction form
   54,611/86,834.50 = 86,834.50/x
3. Step 3: Cross multiply
   54,611x = 86,834.50 × 86,834.50
4. Step 4: Simplify right side
   54,611x = 7,540,230,390.25
5. Step 5: Solve for x
   x = 7,540,230,390.25/54,611
6. Step 6: Final answer
   x = 138,071.64