Finding the Fourth Proportional to 3,856.71, 5,780.49 and 1,774.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.71 : 5,780.49 = 1,774.98 : x
2. Step 2: Convert to fraction form
   3,856.71/5,780.49 = 1,774.98/x
3. Step 3: Cross multiply
   3,856.71x = 5,780.49 × 1,774.98
4. Step 4: Simplify right side
   3,856.71x = 10,260,268.59
5. Step 5: Solve for x
   x = 10,260,268.59/3,856.71
6. Step 6: Final answer
   x = 2,660.37