Finding the Fourth Proportional to 673,557.39, 928,616.00 and 558,401.31

Step by Step Solution

1. Step 1: Write the proportion equation
   673,557.39 : 928,616.00 = 558,401.31 : x
2. Step 2: Convert to fraction form
   673,557.39/928,616.00 = 558,401.31/x
3. Step 3: Cross multiply
   673,557.39x = 928,616.00 × 558,401.31
4. Step 4: Simplify right side
   673,557.39x = 518,540,388,094.95
5. Step 5: Solve for x
   x = 518,540,388,094.95/673,557.39
6. Step 6: Final answer
   x = 769,853.31