Finding the Fourth Proportional to 1,429.67, 1,972.96 and 800.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.67 : 1,972.96 = 800.28 : x
2. Step 2: Convert to fraction form
   1,429.67/1,972.96 = 800.28/x
3. Step 3: Cross multiply
   1,429.67x = 1,972.96 × 800.28
4. Step 4: Simplify right side
   1,429.67x = 1,578,918.43
5. Step 5: Solve for x
   x = 1,578,918.43/1,429.67
6. Step 6: Final answer
   x = 1,104.39