Finding the Fourth Proportional to 2,157.59, 3,236.89 and 696.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.59 : 3,236.89 = 696.69 : x
2. Step 2: Convert to fraction form
   2,157.59/3,236.89 = 696.69/x
3. Step 3: Cross multiply
   2,157.59x = 3,236.89 × 696.69
4. Step 4: Simplify right side
   2,157.59x = 2,255,108.89
5. Step 5: Solve for x
   x = 2,255,108.89/2,157.59
6. Step 6: Final answer
   x = 1,045.20