Finding the Fourth Proportional to 495,494.80, 684,066.54 and 326,221

Step by Step Solution

1. Step 1: Write the proportion equation
   495,494.80 : 684,066.54 = 326,221 : x
2. Step 2: Convert to fraction form
   495,494.80/684,066.54 = 326,221/x
3. Step 3: Cross multiply
   495,494.80x = 684,066.54 × 326,221
4. Step 4: Simplify right side
   495,494.80x = 223,156,870,745.34
5. Step 5: Solve for x
   x = 223,156,870,745.34/495,494.80
6. Step 6: Final answer
   x = 450,371.77