Finding the Fourth Proportional to 76,831.47, 105,786.15 and 65,323.75

Step by Step Solution

1. Step 1: Write the proportion equation
   76,831.47 : 105,786.15 = 65,323.75 : x
2. Step 2: Convert to fraction form
   76,831.47/105,786.15 = 65,323.75/x
3. Step 3: Cross multiply
   76,831.47x = 105,786.15 × 65,323.75
4. Step 4: Simplify right side
   76,831.47x = 6,910,348,016.06
5. Step 5: Solve for x
   x = 6,910,348,016.06/76,831.47
6. Step 6: Final answer
   x = 89,941.63