Finding the Fourth Proportional to 5,371.34, 8,041.35 and 3,990.79

Step by Step Solution

1. Step 1: Write the proportion equation
   5,371.34 : 8,041.35 = 3,990.79 : x
2. Step 2: Convert to fraction form
   5,371.34/8,041.35 = 3,990.79/x
3. Step 3: Cross multiply
   5,371.34x = 8,041.35 × 3,990.79
4. Step 4: Simplify right side
   5,371.34x = 32,091,364.18
5. Step 5: Solve for x
   x = 32,091,364.18/5,371.34
6. Step 6: Final answer
   x = 5,974.56