Finding the Third Proportional to 2,788 and 7,240

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788 : 7,240 = 7,240 : x
2. Step 2: Convert to fraction form
   2,788/7,240 = 7,240/x
3. Step 3: Cross multiply
   2,788x = 7,240 × 7,240
4. Step 4: Simplify right side
   2,788x = 52,417,600
5. Step 5: Solve for x
   x = 52,417,600/2,788
6. Step 6: Final answer
   x = 18,801.15