Finding the Fourth Proportional to 1,259.30, 1,737.89 and 699.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.30 : 1,737.89 = 699.77 : x
2. Step 2: Convert to fraction form
   1,259.30/1,737.89 = 699.77/x
3. Step 3: Cross multiply
   1,259.30x = 1,737.89 × 699.77
4. Step 4: Simplify right side
   1,259.30x = 1,216,111.10
5. Step 5: Solve for x
   x = 1,216,111.10/1,259.30
6. Step 6: Final answer
   x = 965.70