Finding the Fourth Proportional to 492,463.82, 679,443.72 and 388,769.28

Step by Step Solution

1. Step 1: Write the proportion equation
   492,463.82 : 679,443.72 = 388,769.28 : x
2. Step 2: Convert to fraction form
   492,463.82/679,443.72 = 388,769.28/x
3. Step 3: Cross multiply
   492,463.82x = 679,443.72 × 388,769.28
4. Step 4: Simplify right side
   492,463.82x = 264,146,845,824.92
5. Step 5: Solve for x
   x = 264,146,845,824.92/492,463.82
6. Step 6: Final answer
   x = 536,378.18