Finding the Fourth Proportional to 2,628.72, 3,943.26 and 898.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.72 : 3,943.26 = 898.56 : x
2. Step 2: Convert to fraction form
   2,628.72/3,943.26 = 898.56/x
3. Step 3: Cross multiply
   2,628.72x = 3,943.26 × 898.56
4. Step 4: Simplify right side
   2,628.72x = 3,543,255.71
5. Step 5: Solve for x
   x = 3,543,255.71/2,628.72
6. Step 6: Final answer
   x = 1,347.90