Finding the Fourth Proportional to 5,188.93, 7,160.72 and 2,831.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,188.93 : 7,160.72 = 2,831.07 : x
2. Step 2: Convert to fraction form
   5,188.93/7,160.72 = 2,831.07/x
3. Step 3: Cross multiply
   5,188.93x = 7,160.72 × 2,831.07
4. Step 4: Simplify right side
   5,188.93x = 20,272,499.57
5. Step 5: Solve for x
   x = 20,272,499.57/5,188.93
6. Step 6: Final answer
   x = 3,906.87