Finding the Third Proportional to 1,783 and 2,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783 : 2,815.50 = 2,815.50 : x
2. Step 2: Convert to fraction form
   1,783/2,815.50 = 2,815.50/x
3. Step 3: Cross multiply
   1,783x = 2,815.50 × 2,815.50
4. Step 4: Simplify right side
   1,783x = 7,927,040.25
5. Step 5: Solve for x
   x = 7,927,040.25/1,783
6. Step 6: Final answer
   x = 4,445.90