Finding the Third Proportional to 10,451 and 21,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,451 : 21,171.50 = 21,171.50 : x
2. Step 2: Convert to fraction form
   10,451/21,171.50 = 21,171.50/x
3. Step 3: Cross multiply
   10,451x = 21,171.50 × 21,171.50
4. Step 4: Simplify right side
   10,451x = 448,232,412.25
5. Step 5: Solve for x
   x = 448,232,412.25/10,451
6. Step 6: Final answer
   x = 42,888.95