Finding the Fourth Proportional to 3,439.74, 5,156.31 and 1,098.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.74 : 5,156.31 = 1,098.45 : x
2. Step 2: Convert to fraction form
   3,439.74/5,156.31 = 1,098.45/x
3. Step 3: Cross multiply
   3,439.74x = 5,156.31 × 1,098.45
4. Step 4: Simplify right side
   3,439.74x = 5,663,948.72
5. Step 5: Solve for x
   x = 5,663,948.72/3,439.74
6. Step 6: Final answer
   x = 1,646.62