Finding the Fourth Proportional to 2,333.21, 3,499.34 and 689.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,333.21 : 3,499.34 = 689.72 : x
2. Step 2: Convert to fraction form
   2,333.21/3,499.34 = 689.72/x
3. Step 3: Cross multiply
   2,333.21x = 3,499.34 × 689.72
4. Step 4: Simplify right side
   2,333.21x = 2,413,543.84
5. Step 5: Solve for x
   x = 2,413,543.84/2,333.21
6. Step 6: Final answer
   x = 1,034.43