Finding the Third Proportional to 19,620.75 and 42,561.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620.75 : 42,561.75 = 42,561.75 : x
2. Step 2: Convert to fraction form
   19,620.75/42,561.75 = 42,561.75/x
3. Step 3: Cross multiply
   19,620.75x = 42,561.75 × 42,561.75
4. Step 4: Simplify right side
   19,620.75x = 1,811,502,563.06
5. Step 5: Solve for x
   x = 1,811,502,563.06/19,620.75
6. Step 6: Final answer
   x = 92,325.86