Finding the Fourth Proportional to 1,429.98, 2,145.28 and 727.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.98 : 2,145.28 = 727.58 : x
2. Step 2: Convert to fraction form
   1,429.98/2,145.28 = 727.58/x
3. Step 3: Cross multiply
   1,429.98x = 2,145.28 × 727.58
4. Step 4: Simplify right side
   1,429.98x = 1,560,862.82
5. Step 5: Solve for x
   x = 1,560,862.82/1,429.98
6. Step 6: Final answer
   x = 1,091.53