Finding the Fourth Proportional to 2,742.05, 4,112.27 and 892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,742.05 : 4,112.27 = 892.72 : x
2. Step 2: Convert to fraction form
   2,742.05/4,112.27 = 892.72/x
3. Step 3: Cross multiply
   2,742.05x = 4,112.27 × 892.72
4. Step 4: Simplify right side
   2,742.05x = 3,671,109.70
5. Step 5: Solve for x
   x = 3,671,109.70/2,742.05
6. Step 6: Final answer
   x = 1,338.82