Finding the Fourth Proportional to 1,173.89, 1,620.29 and 731.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.89 : 1,620.29 = 731.53 : x
2. Step 2: Convert to fraction form
   1,173.89/1,620.29 = 731.53/x
3. Step 3: Cross multiply
   1,173.89x = 1,620.29 × 731.53
4. Step 4: Simplify right side
   1,173.89x = 1,185,294.60
5. Step 5: Solve for x
   x = 1,185,294.60/1,173.89
6. Step 6: Final answer
   x = 1,009.71