Finding the Third Proportional to 20,172.75 and 42,654.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,172.75 : 42,654.75 = 42,654.75 : x
2. Step 2: Convert to fraction form
   20,172.75/42,654.75 = 42,654.75/x
3. Step 3: Cross multiply
   20,172.75x = 42,654.75 × 42,654.75
4. Step 4: Simplify right side
   20,172.75x = 1,819,427,697.56
5. Step 5: Solve for x
   x = 1,819,427,697.56/20,172.75
6. Step 6: Final answer
   x = 90,192.35