Finding the Fourth Proportional to 636,308.28, 878,111.33 and 349,830.38

Step by Step Solution

1. Step 1: Write the proportion equation
   636,308.28 : 878,111.33 = 349,830.38 : x
2. Step 2: Convert to fraction form
   636,308.28/878,111.33 = 349,830.38/x
3. Step 3: Cross multiply
   636,308.28x = 878,111.33 × 349,830.38
4. Step 4: Simplify right side
   636,308.28x = 307,190,014,116.50
5. Step 5: Solve for x
   x = 307,190,014,116.50/636,308.28
6. Step 6: Final answer
   x = 482,769.16