Finding the Third Proportional to 53,680.50 and 80,887.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,680.50 : 80,887.50 = 80,887.50 : x
2. Step 2: Convert to fraction form
   53,680.50/80,887.50 = 80,887.50/x
3. Step 3: Cross multiply
   53,680.50x = 80,887.50 × 80,887.50
4. Step 4: Simplify right side
   53,680.50x = 6,542,787,656.25
5. Step 5: Solve for x
   x = 6,542,787,656.25/53,680.50
6. Step 6: Final answer
   x = 121,883.88