Finding the Fourth Proportional to 2,369.28, 3,557.92 and 1,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,369.28 : 3,557.92 = 1,978.88 : x
2. Step 2: Convert to fraction form
   2,369.28/3,557.92 = 1,978.88/x
3. Step 3: Cross multiply
   2,369.28x = 3,557.92 × 1,978.88
4. Step 4: Simplify right side
   2,369.28x = 7,040,696.73
5. Step 5: Solve for x
   x = 7,040,696.73/2,369.28
6. Step 6: Final answer
   x = 2,971.66