Finding the Fourth Proportional to 3,656.87, 5,046.47 and 1,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,656.87 : 5,046.47 = 1,978.25 : x
2. Step 2: Convert to fraction form
   3,656.87/5,046.47 = 1,978.25/x
3. Step 3: Cross multiply
   3,656.87x = 5,046.47 × 1,978.25
4. Step 4: Simplify right side
   3,656.87x = 9,983,169.39
5. Step 5: Solve for x
   x = 9,983,169.39/3,656.87
6. Step 6: Final answer
   x = 2,729.98