Finding the Fourth Proportional to 636,300.77, 878,087.18 and 349,818.35

Step by Step Solution

1. Step 1: Write the proportion equation
   636,300.77 : 878,087.18 = 349,818.35 : x
2. Step 2: Convert to fraction form
   636,300.77/878,087.18 = 349,818.35/x
3. Step 3: Cross multiply
   636,300.77x = 878,087.18 × 349,818.35
4. Step 4: Simplify right side
   636,300.77x = 307,171,004,947.86
5. Step 5: Solve for x
   x = 307,171,004,947.86/636,300.77
6. Step 6: Final answer
   x = 482,744.99