Finding the Fourth Proportional to 2,626.61, 3,624.71 and 1,431.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.61 : 3,624.71 = 1,431.57 : x
2. Step 2: Convert to fraction form
   2,626.61/3,624.71 = 1,431.57/x
3. Step 3: Cross multiply
   2,626.61x = 3,624.71 × 1,431.57
4. Step 4: Simplify right side
   2,626.61x = 5,189,018.94
5. Step 5: Solve for x
   x = 5,189,018.94/2,626.61
6. Step 6: Final answer
   x = 1,975.56