Finding the Fourth Proportional to 1,165.01, 1,607.72 and 722.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.01 : 1,607.72 = 722.88 : x
2. Step 2: Convert to fraction form
   1,165.01/1,607.72 = 722.88/x
3. Step 3: Cross multiply
   1,165.01x = 1,607.72 × 722.88
4. Step 4: Simplify right side
   1,165.01x = 1,162,185.02
5. Step 5: Solve for x
   x = 1,162,185.02/1,165.01
6. Step 6: Final answer
   x = 997.58