Finding the Fourth Proportional to 1,428.87, 1,971.61 and 799.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.87 : 1,971.61 = 799.37 : x
2. Step 2: Convert to fraction form
   1,428.87/1,971.61 = 799.37/x
3. Step 3: Cross multiply
   1,428.87x = 1,971.61 × 799.37
4. Step 4: Simplify right side
   1,428.87x = 1,576,045.89
5. Step 5: Solve for x
   x = 1,576,045.89/1,428.87
6. Step 6: Final answer
   x = 1,103.00