Finding the Fourth Proportional to 3,478.74, 5,215.68 and 3,150.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.74 : 5,215.68 = 3,150.69 : x
2. Step 2: Convert to fraction form
   3,478.74/5,215.68 = 3,150.69/x
3. Step 3: Cross multiply
   3,478.74x = 5,215.68 × 3,150.69
4. Step 4: Simplify right side
   3,478.74x = 16,432,990.82
5. Step 5: Solve for x
   x = 16,432,990.82/3,478.74
6. Step 6: Final answer
   x = 4,723.83