Finding the Fourth Proportional to 636,870.12, 878,868.30 and 350,395

Step by Step Solution

1. Step 1: Write the proportion equation
   636,870.12 : 878,868.30 = 350,395 : x
2. Step 2: Convert to fraction form
   636,870.12/878,868.30 = 350,395/x
3. Step 3: Cross multiply
   636,870.12x = 878,868.30 × 350,395
4. Step 4: Simplify right side
   636,870.12x = 307,951,057,978.50
5. Step 5: Solve for x
   x = 307,951,057,978.50/636,870.12
6. Step 6: Final answer
   x = 483,538.24