Finding the Fourth Proportional to 1,152.50, 1,729.31 and 503.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.50 : 1,729.31 = 503.15 : x
2. Step 2: Convert to fraction form
   1,152.50/1,729.31 = 503.15/x
3. Step 3: Cross multiply
   1,152.50x = 1,729.31 × 503.15
4. Step 4: Simplify right side
   1,152.50x = 870,091.16
5. Step 5: Solve for x
   x = 870,091.16/1,152.50
6. Step 6: Final answer
   x = 754.96