Finding the Third Proportional to 6,489 and 10,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,489 : 10,543.50 = 10,543.50 : x
2. Step 2: Convert to fraction form
   6,489/10,543.50 = 10,543.50/x
3. Step 3: Cross multiply
   6,489x = 10,543.50 × 10,543.50
4. Step 4: Simplify right side
   6,489x = 111,165,392.25
5. Step 5: Solve for x
   x = 111,165,392.25/6,489
6. Step 6: Final answer
   x = 17,131.36