Finding the Third Proportional to 53,608.50 and 81,564.75

Step by Step Solution

1. Step 1: Write the proportion equation
   53,608.50 : 81,564.75 = 81,564.75 : x
2. Step 2: Convert to fraction form
   53,608.50/81,564.75 = 81,564.75/x
3. Step 3: Cross multiply
   53,608.50x = 81,564.75 × 81,564.75
4. Step 4: Simplify right side
   53,608.50x = 6,652,808,442.56
5. Step 5: Solve for x
   x = 6,652,808,442.56/53,608.50
6. Step 6: Final answer
   x = 124,099.88