Finding the Fourth Proportional to 1,105.74, 1,525.71 and 756.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.74 : 1,525.71 = 756.30 : x
2. Step 2: Convert to fraction form
   1,105.74/1,525.71 = 756.30/x
3. Step 3: Cross multiply
   1,105.74x = 1,525.71 × 756.30
4. Step 4: Simplify right side
   1,105.74x = 1,153,894.47
5. Step 5: Solve for x
   x = 1,153,894.47/1,105.74
6. Step 6: Final answer
   x = 1,043.55