Finding the Fourth Proportional to 1,321.72, 1,982.69 and 347.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.72 : 1,982.69 = 347.83 : x
2. Step 2: Convert to fraction form
   1,321.72/1,982.69 = 347.83/x
3. Step 3: Cross multiply
   1,321.72x = 1,982.69 × 347.83
4. Step 4: Simplify right side
   1,321.72x = 689,633.67
5. Step 5: Solve for x
   x = 689,633.67/1,321.72
6. Step 6: Final answer
   x = 521.77