Finding the Fourth Proportional to 3,979.50, 5,970.69 and 1,243.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.50 : 5,970.69 = 1,243.50 : x
2. Step 2: Convert to fraction form
   3,979.50/5,970.69 = 1,243.50/x
3. Step 3: Cross multiply
   3,979.50x = 5,970.69 × 1,243.50
4. Step 4: Simplify right side
   3,979.50x = 7,424,553.02
5. Step 5: Solve for x
   x = 7,424,553.02/3,979.50
6. Step 6: Final answer
   x = 1,865.70