Finding the Fourth Proportional to 1,153.34, 1,729.40 and 503.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.34 : 1,729.40 = 503.31 : x
2. Step 2: Convert to fraction form
   1,153.34/1,729.40 = 503.31/x
3. Step 3: Cross multiply
   1,153.34x = 1,729.40 × 503.31
4. Step 4: Simplify right side
   1,153.34x = 870,424.31
5. Step 5: Solve for x
   x = 870,424.31/1,153.34
6. Step 6: Final answer
   x = 754.70