Finding the Fourth Proportional to 3,742.28, 5,164.82 and 3,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,742.28 : 5,164.82 = 3,111.72 : x
2. Step 2: Convert to fraction form
   3,742.28/5,164.82 = 3,111.72/x
3. Step 3: Cross multiply
   3,742.28x = 5,164.82 × 3,111.72
4. Step 4: Simplify right side
   3,742.28x = 16,071,478.81
5. Step 5: Solve for x
   x = 16,071,478.81/3,742.28
6. Step 6: Final answer
   x = 4,294.57