Finding the Fourth Proportional to 1,259.19, 1,737.72 and 699.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.19 : 1,737.72 = 699.69 : x
2. Step 2: Convert to fraction form
   1,259.19/1,737.72 = 699.69/x
3. Step 3: Cross multiply
   1,259.19x = 1,737.72 × 699.69
4. Step 4: Simplify right side
   1,259.19x = 1,215,865.31
5. Step 5: Solve for x
   x = 1,215,865.31/1,259.19
6. Step 6: Final answer
   x = 965.59