Finding the Fourth Proportional to 2,630.20, 3,945.84 and 898.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.20 : 3,945.84 = 898.72 : x
2. Step 2: Convert to fraction form
   2,630.20/3,945.84 = 898.72/x
3. Step 3: Cross multiply
   2,630.20x = 3,945.84 × 898.72
4. Step 4: Simplify right side
   2,630.20x = 3,546,205.32
5. Step 5: Solve for x
   x = 3,546,205.32/2,630.20
6. Step 6: Final answer
   x = 1,348.26