Finding the Fourth Proportional to 2,150.82, 3,225.96 and 690.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.82 : 3,225.96 = 690.12 : x
2. Step 2: Convert to fraction form
   2,150.82/3,225.96 = 690.12/x
3. Step 3: Cross multiply
   2,150.82x = 3,225.96 × 690.12
4. Step 4: Simplify right side
   2,150.82x = 2,226,299.52
5. Step 5: Solve for x
   x = 2,226,299.52/2,150.82
6. Step 6: Final answer
   x = 1,035.09