Finding the Third Proportional to 1,615.78 and 3,150.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.78 : 3,150.56 = 3,150.56 : x
2. Step 2: Convert to fraction form
   1,615.78/3,150.56 = 3,150.56/x
3. Step 3: Cross multiply
   1,615.78x = 3,150.56 × 3,150.56
4. Step 4: Simplify right side
   1,615.78x = 9,926,044.07
5. Step 5: Solve for x
   x = 9,926,044.07/1,615.78
6. Step 6: Final answer
   x = 6,143.19