Finding the Fourth Proportional to 3,550.42, 4,899.71 and 1,978.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,550.42 : 4,899.71 = 1,978.61 : x
2. Step 2: Convert to fraction form
   3,550.42/4,899.71 = 1,978.61/x
3. Step 3: Cross multiply
   3,550.42x = 4,899.71 × 1,978.61
4. Step 4: Simplify right side
   3,550.42x = 9,694,605.31
5. Step 5: Solve for x
   x = 9,694,605.31/3,550.42
6. Step 6: Final answer
   x = 2,730.56