Finding the Third Proportional to 1,387.88 and 3,265.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.88 : 3,265.69 = 3,265.69 : x
2. Step 2: Convert to fraction form
   1,387.88/3,265.69 = 3,265.69/x
3. Step 3: Cross multiply
   1,387.88x = 3,265.69 × 3,265.69
4. Step 4: Simplify right side
   1,387.88x = 10,664,714.85
5. Step 5: Solve for x
   x = 10,664,714.85/1,387.88
6. Step 6: Final answer
   x = 7,684.20