Finding the Fourth Proportional to 378,665.94, 522,558.96 and 208,900.06

Step by Step Solution

1. Step 1: Write the proportion equation
   378,665.94 : 522,558.96 = 208,900.06 : x
2. Step 2: Convert to fraction form
   378,665.94/522,558.96 = 208,900.06/x
3. Step 3: Cross multiply
   378,665.94x = 522,558.96 × 208,900.06
4. Step 4: Simplify right side
   378,665.94x = 109,162,598,097.54
5. Step 5: Solve for x
   x = 109,162,598,097.54/378,665.94
6. Step 6: Final answer
   x = 288,282.06