Finding the Third Proportional to 53,905.50 and 81,610.03

Step by Step Solution

1. Step 1: Write the proportion equation
   53,905.50 : 81,610.03 = 81,610.03 : x
2. Step 2: Convert to fraction form
   53,905.50/81,610.03 = 81,610.03/x
3. Step 3: Cross multiply
   53,905.50x = 81,610.03 × 81,610.03
4. Step 4: Simplify right side
   53,905.50x = 6,660,197,200.63
5. Step 5: Solve for x
   x = 6,660,197,200.63/53,905.50
6. Step 6: Final answer
   x = 123,553.20