Finding the Fourth Proportional to 2,165.73, 2,988.71 and 1,171.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.73 : 2,988.71 = 1,171.01 : x
2. Step 2: Convert to fraction form
   2,165.73/2,988.71 = 1,171.01/x
3. Step 3: Cross multiply
   2,165.73x = 2,988.71 × 1,171.01
4. Step 4: Simplify right side
   2,165.73x = 3,499,788.50
5. Step 5: Solve for x
   x = 3,499,788.50/2,165.73
6. Step 6: Final answer
   x = 1,615.99