Finding the Fourth Proportional to 328,662.72, 492,238.56 and 208,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   328,662.72 : 492,238.56 = 208,710.72 : x
2. Step 2: Convert to fraction form
   328,662.72/492,238.56 = 208,710.72/x
3. Step 3: Cross multiply
   328,662.72x = 492,238.56 × 208,710.72
4. Step 4: Simplify right side
   328,662.72x = 102,735,464,269.36
5. Step 5: Solve for x
   x = 102,735,464,269.36/328,662.72
6. Step 6: Final answer
   x = 312,586.30