Finding the Third Proportional to 55,519.50 and 84,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,519.50 : 84,661.50 = 84,661.50 : x
2. Step 2: Convert to fraction form
   55,519.50/84,661.50 = 84,661.50/x
3. Step 3: Cross multiply
   55,519.50x = 84,661.50 × 84,661.50
4. Step 4: Simplify right side
   55,519.50x = 7,167,569,582.25
5. Step 5: Solve for x
   x = 7,167,569,582.25/55,519.50
6. Step 6: Final answer
   x = 129,100.04