Finding the Fourth Proportional to 220,196.48, 303,861.12 and 123,408.64

Step by Step Solution

1. Step 1: Write the proportion equation
   220,196.48 : 303,861.12 = 123,408.64 : x
2. Step 2: Convert to fraction form
   220,196.48/303,861.12 = 123,408.64/x
3. Step 3: Cross multiply
   220,196.48x = 303,861.12 × 123,408.64
4. Step 4: Simplify right side
   220,196.48x = 37,499,087,568.08
5. Step 5: Solve for x
   x = 37,499,087,568.08/220,196.48
6. Step 6: Final answer
   x = 170,298.31