Finding the Fourth Proportional to 161,665.55, 223,089.61 and 89,054.31

Step by Step Solution

1. Step 1: Write the proportion equation
   161,665.55 : 223,089.61 = 89,054.31 : x
2. Step 2: Convert to fraction form
   161,665.55/223,089.61 = 89,054.31/x
3. Step 3: Cross multiply
   161,665.55x = 223,089.61 × 89,054.31
4. Step 4: Simplify right side
   161,665.55x = 19,867,091,286.72
5. Step 5: Solve for x
   x = 19,867,091,286.72/161,665.55
6. Step 6: Final answer
   x = 122,890.07