Finding the Fourth Proportional to 1,856.40, 2,780.61 and 1,747.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.40 : 2,780.61 = 1,747.37 : x
2. Step 2: Convert to fraction form
   1,856.40/2,780.61 = 1,747.37/x
3. Step 3: Cross multiply
   1,856.40x = 2,780.61 × 1,747.37
4. Step 4: Simplify right side
   1,856.40x = 4,858,740.59
5. Step 5: Solve for x
   x = 4,858,740.59/1,856.40
6. Step 6: Final answer
   x = 2,617.29