Finding the Fourth Proportional to 871.38, 1,308.69 and 799.02

Step by Step Solution

1. Step 1: Write the proportion equation
   871.38 : 1,308.69 = 799.02 : x
2. Step 2: Convert to fraction form
   871.38/1,308.69 = 799.02/x
3. Step 3: Cross multiply
   871.38x = 1,308.69 × 799.02
4. Step 4: Simplify right side
   871.38x = 1,045,669.48
5. Step 5: Solve for x
   x = 1,045,669.48/871.38
6. Step 6: Final answer
   x = 1,200.02