Finding the Fourth Proportional to 161,017.10, 222,193.31 and 89,397.10

Step by Step Solution

1. Step 1: Write the proportion equation
   161,017.10 : 222,193.31 = 89,397.10 : x
2. Step 2: Convert to fraction form
   161,017.10/222,193.31 = 89,397.10/x
3. Step 3: Cross multiply
   161,017.10x = 222,193.31 × 89,397.10
4. Step 4: Simplify right side
   161,017.10x = 19,863,435,995.45
5. Step 5: Solve for x
   x = 19,863,435,995.45/161,017.10
6. Step 6: Final answer
   x = 123,362.28