Finding the Third Proportional to 11,415.80 and 17,912.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,415.80 : 17,912.53 = 17,912.53 : x
2. Step 2: Convert to fraction form
   11,415.80/17,912.53 = 17,912.53/x
3. Step 3: Cross multiply
   11,415.80x = 17,912.53 × 17,912.53
4. Step 4: Simplify right side
   11,415.80x = 320,858,775.78
5. Step 5: Solve for x
   x = 320,858,775.78/11,415.80
6. Step 6: Final answer
   x = 28,106.56