Finding the Third Proportional to 42,257.81 and 65,399.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,257.81 : 65,399.06 = 65,399.06 : x
2. Step 2: Convert to fraction form
   42,257.81/65,399.06 = 65,399.06/x
3. Step 3: Cross multiply
   42,257.81x = 65,399.06 × 65,399.06
4. Step 4: Simplify right side
   42,257.81x = 4,277,037,375.88
5. Step 5: Solve for x
   x = 4,277,037,375.88/42,257.81
6. Step 6: Final answer
   x = 101,212.94