Finding the Fourth Proportional to 3,890.86, 5,831.42 and 3,065.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.86 : 5,831.42 = 3,065.88 : x
2. Step 2: Convert to fraction form
   3,890.86/5,831.42 = 3,065.88/x
3. Step 3: Cross multiply
   3,890.86x = 5,831.42 × 3,065.88
4. Step 4: Simplify right side
   3,890.86x = 17,878,433.95
5. Step 5: Solve for x
   x = 17,878,433.95/3,890.86
6. Step 6: Final answer
   x = 4,594.98