Finding the Fourth Proportional to 2,071.41, 2,858.46 and 1,187.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.41 : 2,858.46 = 1,187.16 : x
2. Step 2: Convert to fraction form
   2,071.41/2,858.46 = 1,187.16/x
3. Step 3: Cross multiply
   2,071.41x = 2,858.46 × 1,187.16
4. Step 4: Simplify right side
   2,071.41x = 3,393,449.37
5. Step 5: Solve for x
   x = 3,393,449.37/2,071.41
6. Step 6: Final answer
   x = 1,638.23