Finding the Third Proportional to 11,311.31 and 12,336.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,311.31 : 12,336.75 = 12,336.75 : x
2. Step 2: Convert to fraction form
   11,311.31/12,336.75 = 12,336.75/x
3. Step 3: Cross multiply
   11,311.31x = 12,336.75 × 12,336.75
4. Step 4: Simplify right side
   11,311.31x = 152,195,400.56
5. Step 5: Solve for x
   x = 152,195,400.56/11,311.31
6. Step 6: Final answer
   x = 13,455.15