Finding the Fourth Proportional to 3,978.73, 5,497.23 and 3,145.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.73 : 5,497.23 = 3,145.83 : x
2. Step 2: Convert to fraction form
   3,978.73/5,497.23 = 3,145.83/x
3. Step 3: Cross multiply
   3,978.73x = 5,497.23 × 3,145.83
4. Step 4: Simplify right side
   3,978.73x = 17,293,351.05
5. Step 5: Solve for x
   x = 17,293,351.05/3,978.73
6. Step 6: Final answer
   x = 4,346.45