Finding the Fourth Proportional to 3,056.78, 4,218.42 and 1,861.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,056.78 : 4,218.42 = 1,861.82 : x
2. Step 2: Convert to fraction form
   3,056.78/4,218.42 = 1,861.82/x
3. Step 3: Cross multiply
   3,056.78x = 4,218.42 × 1,861.82
4. Step 4: Simplify right side
   3,056.78x = 7,853,938.72
5. Step 5: Solve for x
   x = 7,853,938.72/3,056.78
6. Step 6: Final answer
   x = 2,569.35