Finding the Fourth Proportional to 408,127.84, 609,105.50 and 397,499.02

Step by Step Solution

1. Step 1: Write the proportion equation
   408,127.84 : 609,105.50 = 397,499.02 : x
2. Step 2: Convert to fraction form
   408,127.84/609,105.50 = 397,499.02/x
3. Step 3: Cross multiply
   408,127.84x = 609,105.50 × 397,499.02
4. Step 4: Simplify right side
   408,127.84x = 242,118,839,326.61
5. Step 5: Solve for x
   x = 242,118,839,326.61/408,127.84
6. Step 6: Final answer
   x = 593,242.65