Finding the Fourth Proportional to 2,039.05, 2,813.71 and 1,188.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.05 : 2,813.71 = 1,188.17 : x
2. Step 2: Convert to fraction form
   2,039.05/2,813.71 = 1,188.17/x
3. Step 3: Cross multiply
   2,039.05x = 2,813.71 × 1,188.17
4. Step 4: Simplify right side
   2,039.05x = 3,343,164.89
5. Step 5: Solve for x
   x = 3,343,164.89/2,039.05
6. Step 6: Final answer
   x = 1,639.57