Finding the Third Proportional to 9,439.88 and 20,698.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,439.88 : 20,698.88 = 20,698.88 : x
2. Step 2: Convert to fraction form
   9,439.88/20,698.88 = 20,698.88/x
3. Step 3: Cross multiply
   9,439.88x = 20,698.88 × 20,698.88
4. Step 4: Simplify right side
   9,439.88x = 428,443,426.27
5. Step 5: Solve for x
   x = 428,443,426.27/9,439.88
6. Step 6: Final answer
   x = 45,386.56