Finding the Fourth Proportional to 5,904.16, 8,150.32 and 3,990.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,904.16 : 8,150.32 = 3,990.40 : x
2. Step 2: Convert to fraction form
   5,904.16/8,150.32 = 3,990.40/x
3. Step 3: Cross multiply
   5,904.16x = 8,150.32 × 3,990.40
4. Step 4: Simplify right side
   5,904.16x = 32,523,036.93
5. Step 5: Solve for x
   x = 32,523,036.93/5,904.16
6. Step 6: Final answer
   x = 5,508.50