Finding the Third Proportional to 2,155.50 and 2,807.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.50 : 2,807.06 = 2,807.06 : x
2. Step 2: Convert to fraction form
   2,155.50/2,807.06 = 2,807.06/x
3. Step 3: Cross multiply
   2,155.50x = 2,807.06 × 2,807.06
4. Step 4: Simplify right side
   2,155.50x = 7,879,599.88
5. Step 5: Solve for x
   x = 7,879,599.88/2,155.50
6. Step 6: Final answer
   x = 3,655.58