Finding the Fourth Proportional to 2,756.50, 3,805.61 and 1,861.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,756.50 : 3,805.61 = 1,861.81 : x
2. Step 2: Convert to fraction form
   2,756.50/3,805.61 = 1,861.81/x
3. Step 3: Cross multiply
   2,756.50x = 3,805.61 × 1,861.81
4. Step 4: Simplify right side
   2,756.50x = 7,085,303.93
5. Step 5: Solve for x
   x = 7,085,303.93/2,756.50
6. Step 6: Final answer
   x = 2,570.40