Finding the Fourth Proportional to 928,353.57, 1,392,859.82 and 415,978.43

Step by Step Solution

1. Step 1: Write the proportion equation
   928,353.57 : 1,392,859.82 = 415,978.43 : x
2. Step 2: Convert to fraction form
   928,353.57/1,392,859.82 = 415,978.43/x
3. Step 3: Cross multiply
   928,353.57x = 1,392,859.82 × 415,978.43
4. Step 4: Simplify right side
   928,353.57x = 579,399,645,655.78
5. Step 5: Solve for x
   x = 579,399,645,655.78/928,353.57
6. Step 6: Final answer
   x = 624,115.28