Finding the Fourth Proportional to 3,880.96, 5,818.56 and 3,490

Step by Step Solution

1. Step 1: Write the proportion equation
   3,880.96 : 5,818.56 = 3,490 : x
2. Step 2: Convert to fraction form
   3,880.96/5,818.56 = 3,490/x
3. Step 3: Cross multiply
   3,880.96x = 5,818.56 × 3,490
4. Step 4: Simplify right side
   3,880.96x = 20,306,774.40
5. Step 5: Solve for x
   x = 20,306,774.40/3,880.96
6. Step 6: Final answer
   x = 5,232.41