Finding the Fourth Proportional to 328,066.10, 491,321.55 and 328,066.10

Step by Step Solution

1. Step 1: Write the proportion equation
   328,066.10 : 491,321.55 = 328,066.10 : x
2. Step 2: Convert to fraction form
   328,066.10/491,321.55 = 328,066.10/x
3. Step 3: Cross multiply
   328,066.10x = 491,321.55 × 328,066.10
4. Step 4: Simplify right side
   328,066.10x = 161,185,944,754.46
5. Step 5: Solve for x
   x = 161,185,944,754.46/328,066.10
6. Step 6: Final answer
   x = 491,321.55