Finding the Fourth Proportional to 428,768.81, 591,701.82 and 235,178.10

Step by Step Solution

1. Step 1: Write the proportion equation
   428,768.81 : 591,701.82 = 235,178.10 : x
2. Step 2: Convert to fraction form
   428,768.81/591,701.82 = 235,178.10/x
3. Step 3: Cross multiply
   428,768.81x = 591,701.82 × 235,178.10
4. Step 4: Simplify right side
   428,768.81x = 139,155,308,912.22
5. Step 5: Solve for x
   x = 139,155,308,912.22/428,768.81
6. Step 6: Final answer
   x = 324,546.25