Finding the Fourth Proportional to 1,171.19, 1,616.04 and 723.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.19 : 1,616.04 = 723.31 : x
2. Step 2: Convert to fraction form
   1,171.19/1,616.04 = 723.31/x
3. Step 3: Cross multiply
   1,171.19x = 1,616.04 × 723.31
4. Step 4: Simplify right side
   1,171.19x = 1,168,897.89
5. Step 5: Solve for x
   x = 1,168,897.89/1,171.19
6. Step 6: Final answer
   x = 998.04