Finding the Fourth Proportional to 1,036.67, 1,555.31 and 488.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.67 : 1,555.31 = 488.91 : x
2. Step 2: Convert to fraction form
   1,036.67/1,555.31 = 488.91/x
3. Step 3: Cross multiply
   1,036.67x = 1,555.31 × 488.91
4. Step 4: Simplify right side
   1,036.67x = 760,407.83
5. Step 5: Solve for x
   x = 760,407.83/1,036.67
6. Step 6: Final answer
   x = 733.51