Finding the Third Proportional to 8,643.38 and 13,759.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,643.38 : 13,759.88 = 13,759.88 : x
2. Step 2: Convert to fraction form
   8,643.38/13,759.88 = 13,759.88/x
3. Step 3: Cross multiply
   8,643.38x = 13,759.88 × 13,759.88
4. Step 4: Simplify right side
   8,643.38x = 189,334,160.02
5. Step 5: Solve for x
   x = 189,334,160.02/8,643.38
6. Step 6: Final answer
   x = 21,905.12