Finding the Fourth Proportional to 2,165.74, 2,988.72 and 1,171.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.74 : 2,988.72 = 1,171.02 : x
2. Step 2: Convert to fraction form
   2,165.74/2,988.72 = 1,171.02/x
3. Step 3: Cross multiply
   2,165.74x = 2,988.72 × 1,171.02
4. Step 4: Simplify right side
   2,165.74x = 3,499,849.68
5. Step 5: Solve for x
   x = 3,499,849.68/2,165.74
6. Step 6: Final answer
   x = 1,616.01