Finding the Fourth Proportional to 2,235.07, 3,084.61 and 1,861.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,235.07 : 3,084.61 = 1,861.39 : x
2. Step 2: Convert to fraction form
   2,235.07/3,084.61 = 1,861.39/x
3. Step 3: Cross multiply
   2,235.07x = 3,084.61 × 1,861.39
4. Step 4: Simplify right side
   2,235.07x = 5,741,646.78
5. Step 5: Solve for x
   x = 5,741,646.78/2,235.07
6. Step 6: Final answer
   x = 2,568.89