Finding the Third Proportional to 13,509.28 and 27,686.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,509.28 : 27,686.81 = 27,686.81 : x
2. Step 2: Convert to fraction form
   13,509.28/27,686.81 = 27,686.81/x
3. Step 3: Cross multiply
   13,509.28x = 27,686.81 × 27,686.81
4. Step 4: Simplify right side
   13,509.28x = 766,559,586.41
5. Step 5: Solve for x
   x = 766,559,586.41/13,509.28
6. Step 6: Final answer
   x = 56,743.18