Finding the Fourth Proportional to 2,135.30, 3,187.69 and 1,807.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,135.30 : 3,187.69 = 1,807.16 : x
2. Step 2: Convert to fraction form
   2,135.30/3,187.69 = 1,807.16/x
3. Step 3: Cross multiply
   2,135.30x = 3,187.69 × 1,807.16
4. Step 4: Simplify right side
   2,135.30x = 5,760,665.86
5. Step 5: Solve for x
   x = 5,760,665.86/2,135.30
6. Step 6: Final answer
   x = 2,697.83