Finding the Third Proportional to 9,847.20 and 21,078.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,847.20 : 21,078.35 = 21,078.35 : x
2. Step 2: Convert to fraction form
   9,847.20/21,078.35 = 21,078.35/x
3. Step 3: Cross multiply
   9,847.20x = 21,078.35 × 21,078.35
4. Step 4: Simplify right side
   9,847.20x = 444,296,904.59
5. Step 5: Solve for x
   x = 444,296,904.59/9,847.20
6. Step 6: Final answer
   x = 45,119.13