Finding the Fourth Proportional to 1,428.98, 1,972.01 and 799.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.98 : 1,972.01 = 799.47 : x
2. Step 2: Convert to fraction form
   1,428.98/1,972.01 = 799.47/x
3. Step 3: Cross multiply
   1,428.98x = 1,972.01 × 799.47
4. Step 4: Simplify right side
   1,428.98x = 1,576,564.83
5. Step 5: Solve for x
   x = 1,576,564.83/1,428.98
6. Step 6: Final answer
   x = 1,103.28