Finding the Fourth Proportional to 3,978,689.56, 5,969,198.91 and 1,282,960.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,689.56 : 5,969,198.91 = 1,282,960.55 : x
2. Step 2: Convert to fraction form
   3,978,689.56/5,969,198.91 = 1,282,960.55/x
3. Step 3: Cross multiply
   3,978,689.56x = 5,969,198.91 × 1,282,960.55
4. Step 4: Simplify right side
   3,978,689.56x = 7,658,246,736,367.10
5. Step 5: Solve for x
   x = 7,658,246,736,367.10/3,978,689.56
6. Step 6: Final answer
   x = 1,924,816.36