Finding the Fourth Proportional to 3,643.31, 5,462.61 and 1,999.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.31 : 5,462.61 = 1,999.42 : x
2. Step 2: Convert to fraction form
   3,643.31/5,462.61 = 1,999.42/x
3. Step 3: Cross multiply
   3,643.31x = 5,462.61 × 1,999.42
4. Step 4: Simplify right side
   3,643.31x = 10,922,024.37
5. Step 5: Solve for x
   x = 10,922,024.37/3,643.31
6. Step 6: Final answer
   x = 2,997.83