Finding the Third Proportional to 9,312 and 12,807

Step by Step Solution

1. Step 1: Write the proportion equation
   9,312 : 12,807 = 12,807 : x
2. Step 2: Convert to fraction form
   9,312/12,807 = 12,807/x
3. Step 3: Cross multiply
   9,312x = 12,807 × 12,807
4. Step 4: Simplify right side
   9,312x = 164,019,249
5. Step 5: Solve for x
   x = 164,019,249/9,312
6. Step 6: Final answer
   x = 17,613.75