Finding the Fourth Proportional to 5,057.47, 6,978.15 and 3,039.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,057.47 : 6,978.15 = 3,039.96 : x
2. Step 2: Convert to fraction form
   5,057.47/6,978.15 = 3,039.96/x
3. Step 3: Cross multiply
   5,057.47x = 6,978.15 × 3,039.96
4. Step 4: Simplify right side
   5,057.47x = 21,213,323.04
5. Step 5: Solve for x
   x = 21,213,323.04/5,057.47
6. Step 6: Final answer
   x = 4,194.45