Finding the Fourth Proportional to 2,098.86, 2,894.83 and 1,389.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.86 : 2,894.83 = 1,389.45 : x
2. Step 2: Convert to fraction form
   2,098.86/2,894.83 = 1,389.45/x
3. Step 3: Cross multiply
   2,098.86x = 2,894.83 × 1,389.45
4. Step 4: Simplify right side
   2,098.86x = 4,022,221.54
5. Step 5: Solve for x
   x = 4,022,221.54/2,098.86
6. Step 6: Final answer
   x = 1,916.38