Finding the Third Proportional to 17,712 and 21,417.75

Step by Step Solution

1. Step 1: Write the proportion equation
   17,712 : 21,417.75 = 21,417.75 : x
2. Step 2: Convert to fraction form
   17,712/21,417.75 = 21,417.75/x
3. Step 3: Cross multiply
   17,712x = 21,417.75 × 21,417.75
4. Step 4: Simplify right side
   17,712x = 458,720,015.06
5. Step 5: Solve for x
   x = 458,720,015.06/17,712
6. Step 6: Final answer
   x = 25,898.83