Finding the Fourth Proportional to 80,401.16, 120,607.55 and 21,236.06

Step by Step Solution

1. Step 1: Write the proportion equation
   80,401.16 : 120,607.55 = 21,236.06 : x
2. Step 2: Convert to fraction form
   80,401.16/120,607.55 = 21,236.06/x
3. Step 3: Cross multiply
   80,401.16x = 120,607.55 × 21,236.06
4. Step 4: Simplify right side
   80,401.16x = 2,561,229,443.23
5. Step 5: Solve for x
   x = 2,561,229,443.23/80,401.16
6. Step 6: Final answer
   x = 31,855.63