Finding the Fourth Proportional to 161,578.56, 222,977.90 and 89,956.72

Step by Step Solution

1. Step 1: Write the proportion equation
   161,578.56 : 222,977.90 = 89,956.72 : x
2. Step 2: Convert to fraction form
   161,578.56/222,977.90 = 89,956.72/x
3. Step 3: Cross multiply
   161,578.56x = 222,977.90 × 89,956.72
4. Step 4: Simplify right side
   161,578.56x = 20,058,360,516.49
5. Step 5: Solve for x
   x = 20,058,360,516.49/161,578.56
6. Step 6: Final answer
   x = 124,139.99