Finding the Fourth Proportional to 1,808.16, 2,699.28 and 1,728.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,808.16 : 2,699.28 = 1,728.37 : x
2. Step 2: Convert to fraction form
   1,808.16/2,699.28 = 1,728.37/x
3. Step 3: Cross multiply
   1,808.16x = 2,699.28 × 1,728.37
4. Step 4: Simplify right side
   1,808.16x = 4,665,354.57
5. Step 5: Solve for x
   x = 4,665,354.57/1,808.16
6. Step 6: Final answer
   x = 2,580.17