Finding the Fourth Proportional to 1,171.50, 1,615.83 and 723.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.50 : 1,615.83 = 723.36 : x
2. Step 2: Convert to fraction form
   1,171.50/1,615.83 = 723.36/x
3. Step 3: Cross multiply
   1,171.50x = 1,615.83 × 723.36
4. Step 4: Simplify right side
   1,171.50x = 1,168,826.79
5. Step 5: Solve for x
   x = 1,168,826.79/1,171.50
6. Step 6: Final answer
   x = 997.72