Finding the Third Proportional to 55,122.19 and 80,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,122.19 : 80,554.50 = 80,554.50 : x
2. Step 2: Convert to fraction form
   55,122.19/80,554.50 = 80,554.50/x
3. Step 3: Cross multiply
   55,122.19x = 80,554.50 × 80,554.50
4. Step 4: Simplify right side
   55,122.19x = 6,489,027,470.25
5. Step 5: Solve for x
   x = 6,489,027,470.25/55,122.19
6. Step 6: Final answer
   x = 117,720.79