Finding the Fourth Proportional to 261,826.71, 361,361.90 and 154,408.56

Step by Step Solution

1. Step 1: Write the proportion equation
   261,826.71 : 361,361.90 = 154,408.56 : x
2. Step 2: Convert to fraction form
   261,826.71/361,361.90 = 154,408.56/x
3. Step 3: Cross multiply
   261,826.71x = 361,361.90 × 154,408.56
4. Step 4: Simplify right side
   261,826.71x = 55,797,371,003.89
5. Step 5: Solve for x
   x = 55,797,371,003.89/261,826.71
6. Step 6: Final answer
   x = 213,108.02