Finding the Fourth Proportional to 1,322.05, 1,982.96 and 397.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.05 : 1,982.96 = 397.82 : x
2. Step 2: Convert to fraction form
   1,322.05/1,982.96 = 397.82/x
3. Step 3: Cross multiply
   1,322.05x = 1,982.96 × 397.82
4. Step 4: Simplify right side
   1,322.05x = 788,861.15
5. Step 5: Solve for x
   x = 788,861.15/1,322.05
6. Step 6: Final answer
   x = 596.70