Finding the Fourth Proportional to 1,320.12, 1,975.59 and 799.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.12 : 1,975.59 = 799.83 : x
2. Step 2: Convert to fraction form
   1,320.12/1,975.59 = 799.83/x
3. Step 3: Cross multiply
   1,320.12x = 1,975.59 × 799.83
4. Step 4: Simplify right side
   1,320.12x = 1,580,136.15
5. Step 5: Solve for x
   x = 1,580,136.15/1,320.12
6. Step 6: Final answer
   x = 1,196.96