Finding the Fourth Proportional to 2,179.30, 3,266.55 and 1,206.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.30 : 3,266.55 = 1,206.10 : x
2. Step 2: Convert to fraction form
   2,179.30/3,266.55 = 1,206.10/x
3. Step 3: Cross multiply
   2,179.30x = 3,266.55 × 1,206.10
4. Step 4: Simplify right side
   2,179.30x = 3,939,785.96
5. Step 5: Solve for x
   x = 3,939,785.96/2,179.30
6. Step 6: Final answer
   x = 1,807.82