Finding the Fourth Proportional to 12,077.57, 16,663.13 and 7,831.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,077.57 : 16,663.13 = 7,831.94 : x
2. Step 2: Convert to fraction form
   12,077.57/16,663.13 = 7,831.94/x
3. Step 3: Cross multiply
   12,077.57x = 16,663.13 × 7,831.94
4. Step 4: Simplify right side
   12,077.57x = 130,504,634.37
5. Step 5: Solve for x
   x = 130,504,634.37/12,077.57
6. Step 6: Final answer
   x = 10,805.54