Finding the Fourth Proportional to 619,928.86, 855,530.24 and 344,287.98

Step by Step Solution

1. Step 1: Write the proportion equation
   619,928.86 : 855,530.24 = 344,287.98 : x
2. Step 2: Convert to fraction form
   619,928.86/855,530.24 = 344,287.98/x
3. Step 3: Cross multiply
   619,928.86x = 855,530.24 × 344,287.98
4. Step 4: Simplify right side
   619,928.86x = 294,548,778,158.52
5. Step 5: Solve for x
   x = 294,548,778,158.52/619,928.86
6. Step 6: Final answer
   x = 475,133.19