Finding the Fourth Proportional to 2,817.86, 4,226.52 and 870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.86 : 4,226.52 = 870.08 : x
2. Step 2: Convert to fraction form
   2,817.86/4,226.52 = 870.08/x
3. Step 3: Cross multiply
   2,817.86x = 4,226.52 × 870.08
4. Step 4: Simplify right side
   2,817.86x = 3,677,410.52
5. Step 5: Solve for x
   x = 3,677,410.52/2,817.86
6. Step 6: Final answer
   x = 1,305.04