Finding the Fourth Proportional to 2,168.01, 2,991.84 and 1,173.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.01 : 2,991.84 = 1,173.28 : x
2. Step 2: Convert to fraction form
   2,168.01/2,991.84 = 1,173.28/x
3. Step 3: Cross multiply
   2,168.01x = 2,991.84 × 1,173.28
4. Step 4: Simplify right side
   2,168.01x = 3,510,260.17
5. Step 5: Solve for x
   x = 3,510,260.17/2,168.01
6. Step 6: Final answer
   x = 1,619.12