Finding the Third Proportional to 42,615.56 and 65,220.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,615.56 : 65,220.75 = 65,220.75 : x
2. Step 2: Convert to fraction form
   42,615.56/65,220.75 = 65,220.75/x
3. Step 3: Cross multiply
   42,615.56x = 65,220.75 × 65,220.75
4. Step 4: Simplify right side
   42,615.56x = 4,253,746,230.56
5. Step 5: Solve for x
   x = 4,253,746,230.56/42,615.56
6. Step 6: Final answer
   x = 99,816.73