Finding the Fourth Proportional to 492,443.60, 737,628.60 and 409,499.60

Step by Step Solution

1. Step 1: Write the proportion equation
   492,443.60 : 737,628.60 = 409,499.60 : x
2. Step 2: Convert to fraction form
   492,443.60/737,628.60 = 409,499.60/x
3. Step 3: Cross multiply
   492,443.60x = 737,628.60 × 409,499.60
4. Step 4: Simplify right side
   492,443.60x = 302,058,616,648.56
5. Step 5: Solve for x
   x = 302,058,616,648.56/492,443.60
6. Step 6: Final answer
   x = 613,387.23