Finding the Fourth Proportional to 1,861.42, 2,568.76 and 1,271.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.42 : 2,568.76 = 1,271.94 : x
2. Step 2: Convert to fraction form
   1,861.42/2,568.76 = 1,271.94/x
3. Step 3: Cross multiply
   1,861.42x = 2,568.76 × 1,271.94
4. Step 4: Simplify right side
   1,861.42x = 3,267,308.59
5. Step 5: Solve for x
   x = 3,267,308.59/1,861.42
6. Step 6: Final answer
   x = 1,755.28