Finding the Fourth Proportional to 2,151.01, 3,225.83 and 689.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.01 : 3,225.83 = 689.81 : x
2. Step 2: Convert to fraction form
   2,151.01/3,225.83 = 689.81/x
3. Step 3: Cross multiply
   2,151.01x = 3,225.83 × 689.81
4. Step 4: Simplify right side
   2,151.01x = 2,225,214.41
5. Step 5: Solve for x
   x = 2,225,214.41/2,151.01
6. Step 6: Final answer
   x = 1,034.50