Finding the Fourth Proportional to 4,978.73, 7,468.78 and 1,690.94

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.73 : 7,468.78 = 1,690.94 : x
2. Step 2: Convert to fraction form
   4,978.73/7,468.78 = 1,690.94/x
3. Step 3: Cross multiply
   4,978.73x = 7,468.78 × 1,690.94
4. Step 4: Simplify right side
   4,978.73x = 12,629,258.85
5. Step 5: Solve for x
   x = 12,629,258.85/4,978.73
6. Step 6: Final answer
   x = 2,536.64