Finding the Third Proportional to 20,253.75 and 42,120.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,253.75 : 42,120.75 = 42,120.75 : x
2. Step 2: Convert to fraction form
   20,253.75/42,120.75 = 42,120.75/x
3. Step 3: Cross multiply
   20,253.75x = 42,120.75 × 42,120.75
4. Step 4: Simplify right side
   20,253.75x = 1,774,157,580.56
5. Step 5: Solve for x
   x = 1,774,157,580.56/20,253.75
6. Step 6: Final answer
   x = 87,596.50