Finding the Fourth Proportional to 2,144.07, 2,957.31 and 1,435.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.07 : 2,957.31 = 1,435.59 : x
2. Step 2: Convert to fraction form
   2,144.07/2,957.31 = 1,435.59/x
3. Step 3: Cross multiply
   2,144.07x = 2,957.31 × 1,435.59
4. Step 4: Simplify right side
   2,144.07x = 4,245,484.66
5. Step 5: Solve for x
   x = 4,245,484.66/2,144.07
6. Step 6: Final answer
   x = 1,980.11