Finding the Fourth Proportional to 3,986,449.98, 5,980,627.56 and 1,290,778.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986,449.98 : 5,980,627.56 = 1,290,778.38 : x
2. Step 2: Convert to fraction form
   3,986,449.98/5,980,627.56 = 1,290,778.38/x
3. Step 3: Cross multiply
   3,986,449.98x = 5,980,627.56 × 1,290,778.38
4. Step 4: Simplify right side
   3,986,449.98x = 7,719,664,753,280.15
5. Step 5: Solve for x
   x = 7,719,664,753,280.15/3,986,449.98
6. Step 6: Final answer
   x = 1,936,476.01