Finding the Fourth Proportional to 2,057.19, 2,838.83 and 1,172.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.19 : 2,838.83 = 1,172.96 : x
2. Step 2: Convert to fraction form
   2,057.19/2,838.83 = 1,172.96/x
3. Step 3: Cross multiply
   2,057.19x = 2,838.83 × 1,172.96
4. Step 4: Simplify right side
   2,057.19x = 3,329,813.98
5. Step 5: Solve for x
   x = 3,329,813.98/2,057.19
6. Step 6: Final answer
   x = 1,618.62