Finding the Fourth Proportional to 2,116.10, 3,165.15 and 1,898.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.10 : 3,165.15 = 1,898.30 : x
2. Step 2: Convert to fraction form
   2,116.10/3,165.15 = 1,898.30/x
3. Step 3: Cross multiply
   2,116.10x = 3,165.15 × 1,898.30
4. Step 4: Simplify right side
   2,116.10x = 6,008,404.25
5. Step 5: Solve for x
   x = 6,008,404.25/2,116.10
6. Step 6: Final answer
   x = 2,839.38