Finding the Third Proportional to 10,291.38 and 21,390.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,291.38 : 21,390.38 = 21,390.38 : x
2. Step 2: Convert to fraction form
   10,291.38/21,390.38 = 21,390.38/x
3. Step 3: Cross multiply
   10,291.38x = 21,390.38 × 21,390.38
4. Step 4: Simplify right side
   10,291.38x = 457,548,142.64
5. Step 5: Solve for x
   x = 457,548,142.64/10,291.38
6. Step 6: Final answer
   x = 44,459.38