Finding the Third Proportional to 9,868.50 and 21,646.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.50 : 21,646.50 = 21,646.50 : x
2. Step 2: Convert to fraction form
   9,868.50/21,646.50 = 21,646.50/x
3. Step 3: Cross multiply
   9,868.50x = 21,646.50 × 21,646.50
4. Step 4: Simplify right side
   9,868.50x = 468,570,962.25
5. Step 5: Solve for x
   x = 468,570,962.25/9,868.50
6. Step 6: Final answer
   x = 47,481.48