Finding the Fourth Proportional to 1,778.16, 2,668.55 and 1,435.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.16 : 2,668.55 = 1,435.59 : x
2. Step 2: Convert to fraction form
   1,778.16/2,668.55 = 1,435.59/x
3. Step 3: Cross multiply
   1,778.16x = 2,668.55 × 1,435.59
4. Step 4: Simplify right side
   1,778.16x = 3,830,943.69
5. Step 5: Solve for x
   x = 3,830,943.69/1,778.16
6. Step 6: Final answer
   x = 2,154.44