Finding the Fourth Proportional to 52,831.40, 79,249.94 and 13,388.84

Step by Step Solution

1. Step 1: Write the proportion equation
   52,831.40 : 79,249.94 = 13,388.84 : x
2. Step 2: Convert to fraction form
   52,831.40/79,249.94 = 13,388.84/x
3. Step 3: Cross multiply
   52,831.40x = 79,249.94 × 13,388.84
4. Step 4: Simplify right side
   52,831.40x = 1,061,064,766.67
5. Step 5: Solve for x
   x = 1,061,064,766.67/52,831.40
6. Step 6: Final answer
   x = 20,083.98