Finding the Fourth Proportional to 1,479.78, 2,040.93 and 1,380.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.78 : 2,040.93 = 1,380.42 : x
2. Step 2: Convert to fraction form
   1,479.78/2,040.93 = 1,380.42/x
3. Step 3: Cross multiply
   1,479.78x = 2,040.93 × 1,380.42
4. Step 4: Simplify right side
   1,479.78x = 2,817,340.59
5. Step 5: Solve for x
   x = 2,817,340.59/1,479.78
6. Step 6: Final answer
   x = 1,903.89