Finding the Fourth Proportional to 2,616.48, 3,922.83 and 1,318.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.48 : 3,922.83 = 1,318.86 : x
2. Step 2: Convert to fraction form
   2,616.48/3,922.83 = 1,318.86/x
3. Step 3: Cross multiply
   2,616.48x = 3,922.83 × 1,318.86
4. Step 4: Simplify right side
   2,616.48x = 5,173,663.57
5. Step 5: Solve for x
   x = 5,173,663.57/2,616.48
6. Step 6: Final answer
   x = 1,977.34