Finding the Fourth Proportional to 2,099.32, 3,145.88 and 1,868.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.32 : 3,145.88 = 1,868.65 : x
2. Step 2: Convert to fraction form
   2,099.32/3,145.88 = 1,868.65/x
3. Step 3: Cross multiply
   2,099.32x = 3,145.88 × 1,868.65
4. Step 4: Simplify right side
   2,099.32x = 5,878,545.47
5. Step 5: Solve for x
   x = 5,878,545.47/2,099.32
6. Step 6: Final answer
   x = 2,800.22