Finding the Third Proportional to 17,712 and 21,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,712 : 21,478.50 = 21,478.50 : x
2. Step 2: Convert to fraction form
   17,712/21,478.50 = 21,478.50/x
3. Step 3: Cross multiply
   17,712x = 21,478.50 × 21,478.50
4. Step 4: Simplify right side
   17,712x = 461,325,962.25
5. Step 5: Solve for x
   x = 461,325,962.25/17,712
6. Step 6: Final answer
   x = 26,045.96