Finding the Fourth Proportional to 2,706.09, 4,059.42 and 1,320.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,706.09 : 4,059.42 = 1,320.18 : x
2. Step 2: Convert to fraction form
   2,706.09/4,059.42 = 1,320.18/x
3. Step 3: Cross multiply
   2,706.09x = 4,059.42 × 1,320.18
4. Step 4: Simplify right side
   2,706.09x = 5,359,165.10
5. Step 5: Solve for x
   x = 5,359,165.10/2,706.09
6. Step 6: Final answer
   x = 1,980.41