Finding the Fourth Proportional to 428,453.60, 591,270.72 and 237,470.72

Step by Step Solution

1. Step 1: Write the proportion equation
   428,453.60 : 591,270.72 = 237,470.72 : x
2. Step 2: Convert to fraction form
   428,453.60/591,270.72 = 237,470.72/x
3. Step 3: Cross multiply
   428,453.60x = 591,270.72 × 237,470.72
4. Step 4: Simplify right side
   428,453.60x = 140,409,483,593.32
5. Step 5: Solve for x
   x = 140,409,483,593.32/428,453.60
6. Step 6: Final answer
   x = 327,712.23