Finding the Third Proportional to 54,153.75 and 83,690.25

Step by Step Solution

1. Step 1: Write the proportion equation
   54,153.75 : 83,690.25 = 83,690.25 : x
2. Step 2: Convert to fraction form
   54,153.75/83,690.25 = 83,690.25/x
3. Step 3: Cross multiply
   54,153.75x = 83,690.25 × 83,690.25
4. Step 4: Simplify right side
   54,153.75x = 7,004,057,945.06
5. Step 5: Solve for x
   x = 7,004,057,945.06/54,153.75
6. Step 6: Final answer
   x = 129,336.53