Finding the Fourth Proportional to 3,978.16, 5,963.70 and 1,511.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.16 : 5,963.70 = 1,511.31 : x
2. Step 2: Convert to fraction form
   3,978.16/5,963.70 = 1,511.31/x
3. Step 3: Cross multiply
   3,978.16x = 5,963.70 × 1,511.31
4. Step 4: Simplify right side
   3,978.16x = 9,012,999.45
5. Step 5: Solve for x
   x = 9,012,999.45/3,978.16
6. Step 6: Final answer
   x = 2,265.62