Finding the Fourth Proportional to 485,404.89, 669,859.48 and 270,540.34

Step by Step Solution

1. Step 1: Write the proportion equation
   485,404.89 : 669,859.48 = 270,540.34 : x
2. Step 2: Convert to fraction form
   485,404.89/669,859.48 = 270,540.34/x
3. Step 3: Cross multiply
   485,404.89x = 669,859.48 × 270,540.34
4. Step 4: Simplify right side
   485,404.89x = 181,224,006,769.42
5. Step 5: Solve for x
   x = 181,224,006,769.42/485,404.89
6. Step 6: Final answer
   x = 373,346.07