Finding the Fourth Proportional to 80,356.05, 120,524.36 and 21,196.49

Step by Step Solution

1. Step 1: Write the proportion equation
   80,356.05 : 120,524.36 = 21,196.49 : x
2. Step 2: Convert to fraction form
   80,356.05/120,524.36 = 21,196.49/x
3. Step 3: Cross multiply
   80,356.05x = 120,524.36 × 21,196.49
4. Step 4: Simplify right side
   80,356.05x = 2,554,692,682.89
5. Step 5: Solve for x
   x = 2,554,692,682.89/80,356.05
6. Step 6: Final answer
   x = 31,792.16