Finding the Fourth Proportional to 604,945.55, 907,609.03 and 285,084.50

Step by Step Solution

1. Step 1: Write the proportion equation
   604,945.55 : 907,609.03 = 285,084.50 : x
2. Step 2: Convert to fraction form
   604,945.55/907,609.03 = 285,084.50/x
3. Step 3: Cross multiply
   604,945.55x = 907,609.03 × 285,084.50
4. Step 4: Simplify right side
   604,945.55x = 258,745,262,865.88
5. Step 5: Solve for x
   x = 258,745,262,865.88/604,945.55
6. Step 6: Final answer
   x = 427,716.62