Finding the Third Proportional to 11,620.13 and 15,769.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,620.13 : 15,769.69 = 15,769.69 : x
2. Step 2: Convert to fraction form
   11,620.13/15,769.69 = 15,769.69/x
3. Step 3: Cross multiply
   11,620.13x = 15,769.69 × 15,769.69
4. Step 4: Simplify right side
   11,620.13x = 248,683,043.85
5. Step 5: Solve for x
   x = 248,683,043.85/11,620.13
6. Step 6: Final answer
   x = 21,401.06