Finding the Third Proportional to 55,009.50 and 81,516

Step by Step Solution

1. Step 1: Write the proportion equation
   55,009.50 : 81,516 = 81,516 : x
2. Step 2: Convert to fraction form
   55,009.50/81,516 = 81,516/x
3. Step 3: Cross multiply
   55,009.50x = 81,516 × 81,516
4. Step 4: Simplify right side
   55,009.50x = 6,644,858,256
5. Step 5: Solve for x
   x = 6,644,858,256/55,009.50
6. Step 6: Final answer
   x = 120,794.74