Finding the Fourth Proportional to 7,243.10, 10,863.79 and 1,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,243.10 : 10,863.79 = 1,978.50 : x
2. Step 2: Convert to fraction form
   7,243.10/10,863.79 = 1,978.50/x
3. Step 3: Cross multiply
   7,243.10x = 10,863.79 × 1,978.50
4. Step 4: Simplify right side
   7,243.10x = 21,494,044.31
5. Step 5: Solve for x
   x = 21,494,044.31/7,243.10
6. Step 6: Final answer
   x = 2,967.52