Finding the Fourth Proportional to 1,856.59, 2,560.82 and 1,259.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.59 : 2,560.82 = 1,259.28 : x
2. Step 2: Convert to fraction form
   1,856.59/2,560.82 = 1,259.28/x
3. Step 3: Cross multiply
   1,856.59x = 2,560.82 × 1,259.28
4. Step 4: Simplify right side
   1,856.59x = 3,224,783.11
5. Step 5: Solve for x
   x = 3,224,783.11/1,856.59
6. Step 6: Final answer
   x = 1,736.94