Finding the Fourth Proportional to 161,697.57, 223,128.17 and 90,076.05

Step by Step Solution

1. Step 1: Write the proportion equation
   161,697.57 : 223,128.17 = 90,076.05 : x
2. Step 2: Convert to fraction form
   161,697.57/223,128.17 = 90,076.05/x
3. Step 3: Cross multiply
   161,697.57x = 223,128.17 × 90,076.05
4. Step 4: Simplify right side
   161,697.57x = 20,098,504,084.73
5. Step 5: Solve for x
   x = 20,098,504,084.73/161,697.57
6. Step 6: Final answer
   x = 124,296.89