Finding the Fourth Proportional to 1,429.07, 1,972.21 and 799.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.07 : 1,972.21 = 799.68 : x
2. Step 2: Convert to fraction form
   1,429.07/1,972.21 = 799.68/x
3. Step 3: Cross multiply
   1,429.07x = 1,972.21 × 799.68
4. Step 4: Simplify right side
   1,429.07x = 1,577,136.89
5. Step 5: Solve for x
   x = 1,577,136.89/1,429.07
6. Step 6: Final answer
   x = 1,103.61