Finding the Fourth Proportional to 2,785.28, 3,845.12 and 1,902.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.28 : 3,845.12 = 1,902.72 : x
2. Step 2: Convert to fraction form
   2,785.28/3,845.12 = 1,902.72/x
3. Step 3: Cross multiply
   2,785.28x = 3,845.12 × 1,902.72
4. Step 4: Simplify right side
   2,785.28x = 7,316,186.73
5. Step 5: Solve for x
   x = 7,316,186.73/2,785.28
6. Step 6: Final answer
   x = 2,626.73