Finding the Fourth Proportional to 3,952.86, 5,929.50 and 1,320.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,952.86 : 5,929.50 = 1,320.18 : x
2. Step 2: Convert to fraction form
   3,952.86/5,929.50 = 1,320.18/x
3. Step 3: Cross multiply
   3,952.86x = 5,929.50 × 1,320.18
4. Step 4: Simplify right side
   3,952.86x = 7,828,007.31
5. Step 5: Solve for x
   x = 7,828,007.31/3,952.86
6. Step 6: Final answer
   x = 1,980.34