Finding the Fourth Proportional to 3,406.90, 5,108.67 and 1,098.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,406.90 : 5,108.67 = 1,098.10 : x
2. Step 2: Convert to fraction form
   3,406.90/5,108.67 = 1,098.10/x
3. Step 3: Cross multiply
   3,406.90x = 5,108.67 × 1,098.10
4. Step 4: Simplify right side
   3,406.90x = 5,609,830.53
5. Step 5: Solve for x
   x = 5,609,830.53/3,406.90
6. Step 6: Final answer
   x = 1,646.61