Finding the Fourth Proportional to 3,478.89, 4,800.84 and 1,906.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.89 : 4,800.84 = 1,906.98 : x
2. Step 2: Convert to fraction form
   3,478.89/4,800.84 = 1,906.98/x
3. Step 3: Cross multiply
   3,478.89x = 4,800.84 × 1,906.98
4. Step 4: Simplify right side
   3,478.89x = 9,155,105.86
5. Step 5: Solve for x
   x = 9,155,105.86/3,478.89
6. Step 6: Final answer
   x = 2,631.62