Finding the Fourth Proportional to 2,816.21, 3,885.42 and 1,696.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,816.21 : 3,885.42 = 1,696.72 : x
2. Step 2: Convert to fraction form
   2,816.21/3,885.42 = 1,696.72/x
3. Step 3: Cross multiply
   2,816.21x = 3,885.42 × 1,696.72
4. Step 4: Simplify right side
   2,816.21x = 6,592,469.82
5. Step 5: Solve for x
   x = 6,592,469.82/2,816.21
6. Step 6: Final answer
   x = 2,340.90