Finding the Fourth Proportional to 428,770.67, 591,699.50 and 235,174.42

Step by Step Solution

1. Step 1: Write the proportion equation
   428,770.67 : 591,699.50 = 235,174.42 : x
2. Step 2: Convert to fraction form
   428,770.67/591,699.50 = 235,174.42/x
3. Step 3: Cross multiply
   428,770.67x = 591,699.50 × 235,174.42
4. Step 4: Simplify right side
   428,770.67x = 139,152,584,071.67
5. Step 5: Solve for x
   x = 139,152,584,071.67/428,770.67
6. Step 6: Final answer
   x = 324,538.48