Finding the Fourth Proportional to 1,429.26, 1,972.42 and 799.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.26 : 1,972.42 = 799.78 : x
2. Step 2: Convert to fraction form
   1,429.26/1,972.42 = 799.78/x
3. Step 3: Cross multiply
   1,429.26x = 1,972.42 × 799.78
4. Step 4: Simplify right side
   1,429.26x = 1,577,502.07
5. Step 5: Solve for x
   x = 1,577,502.07/1,429.26
6. Step 6: Final answer
   x = 1,103.72