Finding the Fourth Proportional to 3,978.96, 5,969.46 and 1,381.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.96 : 5,969.46 = 1,381.92 : x
2. Step 2: Convert to fraction form
   3,978.96/5,969.46 = 1,381.92/x
3. Step 3: Cross multiply
   3,978.96x = 5,969.46 × 1,381.92
4. Step 4: Simplify right side
   3,978.96x = 8,249,316.16
5. Step 5: Solve for x
   x = 8,249,316.16/3,978.96
6. Step 6: Final answer
   x = 2,073.23