Finding the Fourth Proportional to 2,071.82, 2,859.16 and 1,187.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.82 : 2,859.16 = 1,187.71 : x
2. Step 2: Convert to fraction form
   2,071.82/2,859.16 = 1,187.71/x
3. Step 3: Cross multiply
   2,071.82x = 2,859.16 × 1,187.71
4. Step 4: Simplify right side
   2,071.82x = 3,395,852.92
5. Step 5: Solve for x
   x = 3,395,852.92/2,071.82
6. Step 6: Final answer
   x = 1,639.07