Finding the Fourth Proportional to 2,978.64, 4,468.56 and 898.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.64 : 4,468.56 = 898.56 : x
2. Step 2: Convert to fraction form
   2,978.64/4,468.56 = 898.56/x
3. Step 3: Cross multiply
   2,978.64x = 4,468.56 × 898.56
4. Step 4: Simplify right side
   2,978.64x = 4,015,269.27
5. Step 5: Solve for x
   x = 4,015,269.27/2,978.64
6. Step 6: Final answer
   x = 1,348.02