Finding the Third Proportional to 1,915.31 and 2,851.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.31 : 2,851.03 = 2,851.03 : x
2. Step 2: Convert to fraction form
   1,915.31/2,851.03 = 2,851.03/x
3. Step 3: Cross multiply
   1,915.31x = 2,851.03 × 2,851.03
4. Step 4: Simplify right side
   1,915.31x = 8,128,379.19
5. Step 5: Solve for x
   x = 8,128,379.19/1,915.31
6. Step 6: Final answer
   x = 4,243.89