Finding the Fourth Proportional to 2,099.94, 2,898.06 and 1,390.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.94 : 2,898.06 = 1,390.56 : x
2. Step 2: Convert to fraction form
   2,099.94/2,898.06 = 1,390.56/x
3. Step 3: Cross multiply
   2,099.94x = 2,898.06 × 1,390.56
4. Step 4: Simplify right side
   2,099.94x = 4,029,926.31
5. Step 5: Solve for x
   x = 4,029,926.31/2,099.94
6. Step 6: Final answer
   x = 1,919.07