Finding the Fourth Proportional to 1,036.84, 1,429.86 and 725.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.84 : 1,429.86 = 725.80 : x
2. Step 2: Convert to fraction form
   1,036.84/1,429.86 = 725.80/x
3. Step 3: Cross multiply
   1,036.84x = 1,429.86 × 725.80
4. Step 4: Simplify right side
   1,036.84x = 1,037,792.39
5. Step 5: Solve for x
   x = 1,037,792.39/1,036.84
6. Step 6: Final answer
   x = 1,000.92