Finding the Third Proportional to 10,956 and 16,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,956 : 16,978.50 = 16,978.50 : x
2. Step 2: Convert to fraction form
   10,956/16,978.50 = 16,978.50/x
3. Step 3: Cross multiply
   10,956x = 16,978.50 × 16,978.50
4. Step 4: Simplify right side
   10,956x = 288,269,462.25
5. Step 5: Solve for x
   x = 288,269,462.25/10,956
6. Step 6: Final answer
   x = 26,311.56