Finding the Fourth Proportional to 1,856.58, 2,560.38 and 1,359.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.58 : 2,560.38 = 1,359.06 : x
2. Step 2: Convert to fraction form
   1,856.58/2,560.38 = 1,359.06/x
3. Step 3: Cross multiply
   1,856.58x = 2,560.38 × 1,359.06
4. Step 4: Simplify right side
   1,856.58x = 3,479,710.04
5. Step 5: Solve for x
   x = 3,479,710.04/1,856.58
6. Step 6: Final answer
   x = 1,874.26