Finding the Fourth Proportional to 2,785.16, 3,838.71 and 2,428.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.16 : 3,838.71 = 2,428.86 : x
2. Step 2: Convert to fraction form
   2,785.16/3,838.71 = 2,428.86/x
3. Step 3: Cross multiply
   2,785.16x = 3,838.71 × 2,428.86
4. Step 4: Simplify right side
   2,785.16x = 9,323,689.17
5. Step 5: Solve for x
   x = 9,323,689.17/2,785.16
6. Step 6: Final answer
   x = 3,347.63