Finding the Fourth Proportional to 1,429.88, 1,973.40 and 800.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.88 : 1,973.40 = 800.51 : x
2. Step 2: Convert to fraction form
   1,429.88/1,973.40 = 800.51/x
3. Step 3: Cross multiply
   1,429.88x = 1,973.40 × 800.51
4. Step 4: Simplify right side
   1,429.88x = 1,579,713.57
5. Step 5: Solve for x
   x = 1,579,713.57/1,429.88
6. Step 6: Final answer
   x = 1,104.79