Finding the Fourth Proportional to 2,190.79, 3,284.06 and 874.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.79 : 3,284.06 = 874.16 : x
2. Step 2: Convert to fraction form
   2,190.79/3,284.06 = 874.16/x
3. Step 3: Cross multiply
   2,190.79x = 3,284.06 × 874.16
4. Step 4: Simplify right side
   2,190.79x = 2,870,773.10
5. Step 5: Solve for x
   x = 2,870,773.10/2,190.79
6. Step 6: Final answer
   x = 1,310.38