Finding the Third Proportional to 9,718 and 21,402.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,718 : 21,402.50 = 21,402.50 : x
2. Step 2: Convert to fraction form
   9,718/21,402.50 = 21,402.50/x
3. Step 3: Cross multiply
   9,718x = 21,402.50 × 21,402.50
4. Step 4: Simplify right side
   9,718x = 458,067,006.25
5. Step 5: Solve for x
   x = 458,067,006.25/9,718
6. Step 6: Final answer
   x = 47,135.93