Finding the Fourth Proportional to 4,928.66, 7,393.89 and 2,978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   4,928.66 : 7,393.89 = 2,978.54 : x
2. Step 2: Convert to fraction form
   4,928.66/7,393.89 = 2,978.54/x
3. Step 3: Cross multiply
   4,928.66x = 7,393.89 × 2,978.54
4. Step 4: Simplify right side
   4,928.66x = 22,022,997.12
5. Step 5: Solve for x
   x = 22,022,997.12/4,928.66
6. Step 6: Final answer
   x = 4,468.35