Finding the Fourth Proportional to 161,386.98, 222,688.35 and 89,766.78

Step by Step Solution

1. Step 1: Write the proportion equation
   161,386.98 : 222,688.35 = 89,766.78 : x
2. Step 2: Convert to fraction form
   161,386.98/222,688.35 = 89,766.78/x
3. Step 3: Cross multiply
   161,386.98x = 222,688.35 × 89,766.78
4. Step 4: Simplify right side
   161,386.98x = 19,990,016,123.01
5. Step 5: Solve for x
   x = 19,990,016,123.01/161,386.98
6. Step 6: Final answer
   x = 123,863.87