Finding the Fourth Proportional to 2,098.43, 3,145.59 and 781.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.43 : 3,145.59 = 781.22 : x
2. Step 2: Convert to fraction form
   2,098.43/3,145.59 = 781.22/x
3. Step 3: Cross multiply
   2,098.43x = 3,145.59 × 781.22
4. Step 4: Simplify right side
   2,098.43x = 2,457,382.09
5. Step 5: Solve for x
   x = 2,457,382.09/2,098.43
6. Step 6: Final answer
   x = 1,171.06