Finding the Fourth Proportional to 1,429.73, 1,972.93 and 800.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.73 : 1,972.93 = 800.15 : x
2. Step 2: Convert to fraction form
   1,429.73/1,972.93 = 800.15/x
3. Step 3: Cross multiply
   1,429.73x = 1,972.93 × 800.15
4. Step 4: Simplify right side
   1,429.73x = 1,578,639.94
5. Step 5: Solve for x
   x = 1,578,639.94/1,429.73
6. Step 6: Final answer
   x = 1,104.15