Finding the Fourth Proportional to 2,151.25, 3,226.71 and 690.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.25 : 3,226.71 = 690.01 : x
2. Step 2: Convert to fraction form
   2,151.25/3,226.71 = 690.01/x
3. Step 3: Cross multiply
   2,151.25x = 3,226.71 × 690.01
4. Step 4: Simplify right side
   2,151.25x = 2,226,446.03
5. Step 5: Solve for x
   x = 2,226,446.03/2,151.25
6. Step 6: Final answer
   x = 1,034.96