Finding the Fourth Proportional to 2,071.29, 2,858.43 and 1,187.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.29 : 2,858.43 = 1,187.37 : x
2. Step 2: Convert to fraction form
   2,071.29/2,858.43 = 1,187.37/x
3. Step 3: Cross multiply
   2,071.29x = 2,858.43 × 1,187.37
4. Step 4: Simplify right side
   2,071.29x = 3,394,014.03
5. Step 5: Solve for x
   x = 3,394,014.03/2,071.29
6. Step 6: Final answer
   x = 1,638.60