Finding the Fourth Proportional to 3,615.82, 5,423.70 and 1,861.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.82 : 5,423.70 = 1,861.31 : x
2. Step 2: Convert to fraction form
   3,615.82/5,423.70 = 1,861.31/x
3. Step 3: Cross multiply
   3,615.82x = 5,423.70 × 1,861.31
4. Step 4: Simplify right side
   3,615.82x = 10,095,207.59
5. Step 5: Solve for x
   x = 10,095,207.59/3,615.82
6. Step 6: Final answer
   x = 2,791.96