Finding the Third Proportional to 11,557.69 and 15,365.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,557.69 : 15,365.53 = 15,365.53 : x
2. Step 2: Convert to fraction form
   11,557.69/15,365.53 = 15,365.53/x
3. Step 3: Cross multiply
   11,557.69x = 15,365.53 × 15,365.53
4. Step 4: Simplify right side
   11,557.69x = 236,099,550.59
5. Step 5: Solve for x
   x = 236,099,550.59/11,557.69
6. Step 6: Final answer
   x = 20,427.92