Finding the Fourth Proportional to 1,259.39, 1,737.90 and 699.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.39 : 1,737.90 = 699.89 : x
2. Step 2: Convert to fraction form
   1,259.39/1,737.90 = 699.89/x
3. Step 3: Cross multiply
   1,259.39x = 1,737.90 × 699.89
4. Step 4: Simplify right side
   1,259.39x = 1,216,335.33
5. Step 5: Solve for x
   x = 1,216,335.33/1,259.39
6. Step 6: Final answer
   x = 965.82