Finding the Fourth Proportional to 1,569.46, 2,165.84 and 870.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.46 : 2,165.84 = 870.83 : x
2. Step 2: Convert to fraction form
   1,569.46/2,165.84 = 870.83/x
3. Step 3: Cross multiply
   1,569.46x = 2,165.84 × 870.83
4. Step 4: Simplify right side
   1,569.46x = 1,886,078.45
5. Step 5: Solve for x
   x = 1,886,078.45/1,569.46
6. Step 6: Final answer
   x = 1,201.74