Finding the Fourth Proportional to 4,978.32, 7,464.95 and 2,786.46

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.32 : 7,464.95 = 2,786.46 : x
2. Step 2: Convert to fraction form
   4,978.32/7,464.95 = 2,786.46/x
3. Step 3: Cross multiply
   4,978.32x = 7,464.95 × 2,786.46
4. Step 4: Simplify right side
   4,978.32x = 20,800,784.58
5. Step 5: Solve for x
   x = 20,800,784.58/4,978.32
6. Step 6: Final answer
   x = 4,178.27