Finding the Third Proportional to 2,820.38 and 4,387.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.38 : 4,387.69 = 4,387.69 : x
2. Step 2: Convert to fraction form
   2,820.38/4,387.69 = 4,387.69/x
3. Step 3: Cross multiply
   2,820.38x = 4,387.69 × 4,387.69
4. Step 4: Simplify right side
   2,820.38x = 19,251,801.60
5. Step 5: Solve for x
   x = 19,251,801.60/2,820.38
6. Step 6: Final answer
   x = 6,825.97