Finding the Third Proportional to 54,685.75 and 85,673.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,685.75 : 85,673.50 = 85,673.50 : x
2. Step 2: Convert to fraction form
   54,685.75/85,673.50 = 85,673.50/x
3. Step 3: Cross multiply
   54,685.75x = 85,673.50 × 85,673.50
4. Step 4: Simplify right side
   54,685.75x = 7,339,948,602.25
5. Step 5: Solve for x
   x = 7,339,948,602.25/54,685.75
6. Step 6: Final answer
   x = 134,220.50