Finding the Fourth Proportional to 1,856.98, 2,783.04 and 1,077.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.98 : 2,783.04 = 1,077.40 : x
2. Step 2: Convert to fraction form
   1,856.98/2,783.04 = 1,077.40/x
3. Step 3: Cross multiply
   1,856.98x = 2,783.04 × 1,077.40
4. Step 4: Simplify right side
   1,856.98x = 2,998,447.30
5. Step 5: Solve for x
   x = 2,998,447.30/1,856.98
6. Step 6: Final answer
   x = 1,614.69