Finding the Fourth Proportional to 1,779.12, 2,664.43 and 1,386.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,779.12 : 2,664.43 = 1,386.27 : x
2. Step 2: Convert to fraction form
   1,779.12/2,664.43 = 1,386.27/x
3. Step 3: Cross multiply
   1,779.12x = 2,664.43 × 1,386.27
4. Step 4: Simplify right side
   1,779.12x = 3,693,615.91
5. Step 5: Solve for x
   x = 3,693,615.91/1,779.12
6. Step 6: Final answer
   x = 2,076.09