Finding the Fourth Proportional to 158,408.72, 218,610.06 and 90,436.76

Step by Step Solution

1. Step 1: Write the proportion equation
   158,408.72 : 218,610.06 = 90,436.76 : x
2. Step 2: Convert to fraction form
   158,408.72/218,610.06 = 90,436.76/x
3. Step 3: Cross multiply
   158,408.72x = 218,610.06 × 90,436.76
4. Step 4: Simplify right side
   158,408.72x = 19,770,385,529.81
5. Step 5: Solve for x
   x = 19,770,385,529.81/158,408.72
6. Step 6: Final answer
   x = 124,806.17