Finding the Third Proportional to 8,569.55 and 12,945.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,569.55 : 12,945.45 = 12,945.45 : x
2. Step 2: Convert to fraction form
   8,569.55/12,945.45 = 12,945.45/x
3. Step 3: Cross multiply
   8,569.55x = 12,945.45 × 12,945.45
4. Step 4: Simplify right side
   8,569.55x = 167,584,554.34
5. Step 5: Solve for x
   x = 167,584,554.34/8,569.55
6. Step 6: Final answer
   x = 19,555.82