Finding the Fourth Proportional to 2,978.87, 4,468.85 and 898.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.87 : 4,468.85 = 898.79 : x
2. Step 2: Convert to fraction form
   2,978.87/4,468.85 = 898.79/x
3. Step 3: Cross multiply
   2,978.87x = 4,468.85 × 898.79
4. Step 4: Simplify right side
   2,978.87x = 4,016,553.20
5. Step 5: Solve for x
   x = 4,016,553.20/2,978.87
6. Step 6: Final answer
   x = 1,348.35