Finding the Fourth Proportional to 2,830.95, 4,245.35 and 856.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.95 : 4,245.35 = 856.17 : x
2. Step 2: Convert to fraction form
   2,830.95/4,245.35 = 856.17/x
3. Step 3: Cross multiply
   2,830.95x = 4,245.35 × 856.17
4. Step 4: Simplify right side
   2,830.95x = 3,634,737.03
5. Step 5: Solve for x
   x = 3,634,737.03/2,830.95
6. Step 6: Final answer
   x = 1,283.93