Finding the Fourth Proportional to 161,051.42, 222,243.54 and 89,435.90

Step by Step Solution

1. Step 1: Write the proportion equation
   161,051.42 : 222,243.54 = 89,435.90 : x
2. Step 2: Convert to fraction form
   161,051.42/222,243.54 = 89,435.90/x
3. Step 3: Cross multiply
   161,051.42x = 222,243.54 × 89,435.90
4. Step 4: Simplify right side
   161,051.42x = 19,876,551,019.09
5. Step 5: Solve for x
   x = 19,876,551,019.09/161,051.42
6. Step 6: Final answer
   x = 123,417.42