Finding the Fourth Proportional to 2,098.81, 2,896.88 and 1,215.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.81 : 2,896.88 = 1,215.13 : x
2. Step 2: Convert to fraction form
   2,098.81/2,896.88 = 1,215.13/x
3. Step 3: Cross multiply
   2,098.81x = 2,896.88 × 1,215.13
4. Step 4: Simplify right side
   2,098.81x = 3,520,085.79
5. Step 5: Solve for x
   x = 3,520,085.79/2,098.81
6. Step 6: Final answer
   x = 1,677.18