Finding the Fourth Proportional to 2,190.38, 3,022.72 and 1,307.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.38 : 3,022.72 = 1,307.37 : x
2. Step 2: Convert to fraction form
   2,190.38/3,022.72 = 1,307.37/x
3. Step 3: Cross multiply
   2,190.38x = 3,022.72 × 1,307.37
4. Step 4: Simplify right side
   2,190.38x = 3,951,821.51
5. Step 5: Solve for x
   x = 3,951,821.51/2,190.38
6. Step 6: Final answer
   x = 1,804.18