Finding the Fourth Proportional to 3,978.02, 5,967.57 and 1,380.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.02 : 5,967.57 = 1,380.62 : x
2. Step 2: Convert to fraction form
   3,978.02/5,967.57 = 1,380.62/x
3. Step 3: Cross multiply
   3,978.02x = 5,967.57 × 1,380.62
4. Step 4: Simplify right side
   3,978.02x = 8,238,946.49
5. Step 5: Solve for x
   x = 8,238,946.49/3,978.02
6. Step 6: Final answer
   x = 2,071.12