Finding the Fourth Proportional to 3,931.76, 5,890.34 and 3,494.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.76 : 5,890.34 = 3,494.36 : x
2. Step 2: Convert to fraction form
   3,931.76/5,890.34 = 3,494.36/x
3. Step 3: Cross multiply
   3,931.76x = 5,890.34 × 3,494.36
4. Step 4: Simplify right side
   3,931.76x = 20,582,968.48
5. Step 5: Solve for x
   x = 20,582,968.48/3,931.76
6. Step 6: Final answer
   x = 5,235.05