Finding the Fourth Proportional to 2,199.69, 3,035.58 and 1,315.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.69 : 3,035.58 = 1,315.51 : x
2. Step 2: Convert to fraction form
   2,199.69/3,035.58 = 1,315.51/x
3. Step 3: Cross multiply
   2,199.69x = 3,035.58 × 1,315.51
4. Step 4: Simplify right side
   2,199.69x = 3,993,323.32
5. Step 5: Solve for x
   x = 3,993,323.32/2,199.69
6. Step 6: Final answer
   x = 1,815.40