Finding the Fourth Proportional to 2,056.99, 2,838.81 and 1,172.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.99 : 2,838.81 = 1,172.59 : x
2. Step 2: Convert to fraction form
   2,056.99/2,838.81 = 1,172.59/x
3. Step 3: Cross multiply
   2,056.99x = 2,838.81 × 1,172.59
4. Step 4: Simplify right side
   2,056.99x = 3,328,760.22
5. Step 5: Solve for x
   x = 3,328,760.22/2,056.99
6. Step 6: Final answer
   x = 1,618.27