Finding the Fourth Proportional to 1,126.69, 1,553.41 and 870.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126.69 : 1,553.41 = 870.73 : x
2. Step 2: Convert to fraction form
   1,126.69/1,553.41 = 870.73/x
3. Step 3: Cross multiply
   1,126.69x = 1,553.41 × 870.73
4. Step 4: Simplify right side
   1,126.69x = 1,352,597.89
5. Step 5: Solve for x
   x = 1,352,597.89/1,126.69
6. Step 6: Final answer
   x = 1,200.51