Finding the Fourth Proportional to 1,127.34, 1,555.07 and 728.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.34 : 1,555.07 = 728.82 : x
2. Step 2: Convert to fraction form
   1,127.34/1,555.07 = 728.82/x
3. Step 3: Cross multiply
   1,127.34x = 1,555.07 × 728.82
4. Step 4: Simplify right side
   1,127.34x = 1,133,362.47
5. Step 5: Solve for x
   x = 1,133,362.47/1,127.34
6. Step 6: Final answer
   x = 1,005.34