Finding the Third Proportional to 55,513 and 81,799

Step by Step Solution

1. Step 1: Write the proportion equation
   55,513 : 81,799 = 81,799 : x
2. Step 2: Convert to fraction form
   55,513/81,799 = 81,799/x
3. Step 3: Cross multiply
   55,513x = 81,799 × 81,799
4. Step 4: Simplify right side
   55,513x = 6,691,076,401
5. Step 5: Solve for x
   x = 6,691,076,401/55,513
6. Step 6: Final answer
   x = 120,531.70