Finding the Third Proportional to 20,209.50 and 42,975.56

Step by Step Solution

1. Step 1: Write the proportion equation
   20,209.50 : 42,975.56 = 42,975.56 : x
2. Step 2: Convert to fraction form
   20,209.50/42,975.56 = 42,975.56/x
3. Step 3: Cross multiply
   20,209.50x = 42,975.56 × 42,975.56
4. Step 4: Simplify right side
   20,209.50x = 1,846,898,972.19
5. Step 5: Solve for x
   x = 1,846,898,972.19/20,209.50
6. Step 6: Final answer
   x = 91,387.66