Finding the Fourth Proportional to 1,259.35, 1,737.71 and 699.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.35 : 1,737.71 = 699.81 : x
2. Step 2: Convert to fraction form
   1,259.35/1,737.71 = 699.81/x
3. Step 3: Cross multiply
   1,259.35x = 1,737.71 × 699.81
4. Step 4: Simplify right side
   1,259.35x = 1,216,066.84
5. Step 5: Solve for x
   x = 1,216,066.84/1,259.35
6. Step 6: Final answer
   x = 965.63