Finding the Fourth Proportional to 2,056.41, 2,838.35 and 1,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.41 : 2,838.35 = 1,172.72 : x
2. Step 2: Convert to fraction form
   2,056.41/2,838.35 = 1,172.72/x
3. Step 3: Cross multiply
   2,056.41x = 2,838.35 × 1,172.72
4. Step 4: Simplify right side
   2,056.41x = 3,328,589.81
5. Step 5: Solve for x
   x = 3,328,589.81/2,056.41
6. Step 6: Final answer
   x = 1,618.64