Finding the Fourth Proportional to 3,978.13, 5,966.37 and 1,512.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.13 : 5,966.37 = 1,512.09 : x
2. Step 2: Convert to fraction form
   3,978.13/5,966.37 = 1,512.09/x
3. Step 3: Cross multiply
   3,978.13x = 5,966.37 × 1,512.09
4. Step 4: Simplify right side
   3,978.13x = 9,021,688.41
5. Step 5: Solve for x
   x = 9,021,688.41/3,978.13
6. Step 6: Final answer
   x = 2,267.82