Finding the Third Proportional to 8,663.63 and 13,771.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,663.63 : 13,771.69 = 13,771.69 : x
2. Step 2: Convert to fraction form
   8,663.63/13,771.69 = 13,771.69/x
3. Step 3: Cross multiply
   8,663.63x = 13,771.69 × 13,771.69
4. Step 4: Simplify right side
   8,663.63x = 189,659,376.60
5. Step 5: Solve for x
   x = 189,659,376.60/8,663.63
6. Step 6: Final answer
   x = 21,891.46