Finding the Fourth Proportional to 85,885.82, 128,768.37 and 37,831.62

Step by Step Solution

1. Step 1: Write the proportion equation
   85,885.82 : 128,768.37 = 37,831.62 : x
2. Step 2: Convert to fraction form
   85,885.82/128,768.37 = 37,831.62/x
3. Step 3: Cross multiply
   85,885.82x = 128,768.37 × 37,831.62
4. Step 4: Simplify right side
   85,885.82x = 4,871,515,852.70
5. Step 5: Solve for x
   x = 4,871,515,852.70/85,885.82
6. Step 6: Final answer
   x = 56,720.84