Finding the Third Proportional to 1,915.31 and 2,928.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.31 : 2,928.56 = 2,928.56 : x
2. Step 2: Convert to fraction form
   1,915.31/2,928.56 = 2,928.56/x
3. Step 3: Cross multiply
   1,915.31x = 2,928.56 × 2,928.56
4. Step 4: Simplify right side
   1,915.31x = 8,576,478.32
5. Step 5: Solve for x
   x = 8,576,478.32/1,915.31
6. Step 6: Final answer
   x = 4,477.85