Finding the Third Proportional to 8,631.56 and 13,767.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,631.56 : 13,767.47 = 13,767.47 : x
2. Step 2: Convert to fraction form
   8,631.56/13,767.47 = 13,767.47/x
3. Step 3: Cross multiply
   8,631.56x = 13,767.47 × 13,767.47
4. Step 4: Simplify right side
   8,631.56x = 189,543,195.78
5. Step 5: Solve for x
   x = 189,543,195.78/8,631.56
6. Step 6: Final answer
   x = 21,959.31