Finding the Fourth Proportional to 1,856.79, 2,558.79 and 1,524.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.79 : 2,558.79 = 1,524.15 : x
2. Step 2: Convert to fraction form
   1,856.79/2,558.79 = 1,524.15/x
3. Step 3: Cross multiply
   1,856.79x = 2,558.79 × 1,524.15
4. Step 4: Simplify right side
   1,856.79x = 3,899,979.78
5. Step 5: Solve for x
   x = 3,899,979.78/1,856.79
6. Step 6: Final answer
   x = 2,100.39