Finding the Fourth Proportional to 3,990.52, 5,984.56 and 1,909.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.52 : 5,984.56 = 1,909.42 : x
2. Step 2: Convert to fraction form
   3,990.52/5,984.56 = 1,909.42/x
3. Step 3: Cross multiply
   3,990.52x = 5,984.56 × 1,909.42
4. Step 4: Simplify right side
   3,990.52x = 11,427,038.56
5. Step 5: Solve for x
   x = 11,427,038.56/3,990.52
6. Step 6: Final answer
   x = 2,863.55