Finding the Fourth Proportional to 3,656.69, 5,046.24 and 1,978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,656.69 : 5,046.24 = 1,978.09 : x
2. Step 2: Convert to fraction form
   3,656.69/5,046.24 = 1,978.09/x
3. Step 3: Cross multiply
   3,656.69x = 5,046.24 × 1,978.09
4. Step 4: Simplify right side
   3,656.69x = 9,981,915.77
5. Step 5: Solve for x
   x = 9,981,915.77/3,656.69
6. Step 6: Final answer
   x = 2,729.77