Finding the Fourth Proportional to 220,308.58, 303,998.96 and 123,490.09

Step by Step Solution

1. Step 1: Write the proportion equation
   220,308.58 : 303,998.96 = 123,490.09 : x
2. Step 2: Convert to fraction form
   220,308.58/303,998.96 = 123,490.09/x
3. Step 3: Cross multiply
   220,308.58x = 303,998.96 × 123,490.09
4. Step 4: Simplify right side
   220,308.58x = 37,540,856,792.86
5. Step 5: Solve for x
   x = 37,540,856,792.86/220,308.58
6. Step 6: Final answer
   x = 170,401.25