Finding the Fourth Proportional to 1,398.83, 2,099.00 and 851.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.83 : 2,099.00 = 851.39 : x
2. Step 2: Convert to fraction form
   1,398.83/2,099.00 = 851.39/x
3. Step 3: Cross multiply
   1,398.83x = 2,099.00 × 851.39
4. Step 4: Simplify right side
   1,398.83x = 1,787,052.86
5. Step 5: Solve for x
   x = 1,787,052.86/1,398.83
6. Step 6: Final answer
   x = 1,277.54