Finding the Fourth Proportional to 3,943.98, 5,906.61 and 2,186.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,943.98 : 5,906.61 = 2,186.46 : x
2. Step 2: Convert to fraction form
   3,943.98/5,906.61 = 2,186.46/x
3. Step 3: Cross multiply
   3,943.98x = 5,906.61 × 2,186.46
4. Step 4: Simplify right side
   3,943.98x = 12,914,566.50
5. Step 5: Solve for x
   x = 12,914,566.50/3,943.98
6. Step 6: Final answer
   x = 3,274.50