Finding the Fourth Proportional to 161,738.48, 223,196.15 and 90,116.97

Step by Step Solution

1. Step 1: Write the proportion equation
   161,738.48 : 223,196.15 = 90,116.97 : x
2. Step 2: Convert to fraction form
   161,738.48/223,196.15 = 90,116.97/x
3. Step 3: Cross multiply
   161,738.48x = 223,196.15 × 90,116.97
4. Step 4: Simplify right side
   161,738.48x = 20,113,760,753.67
5. Step 5: Solve for x
   x = 20,113,760,753.67/161,738.48
6. Step 6: Final answer
   x = 124,359.77