Finding the Fourth Proportional to 1,907.18, 2,631.90 and 1,067.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,907.18 : 2,631.90 = 1,067.89 : x
2. Step 2: Convert to fraction form
   1,907.18/2,631.90 = 1,067.89/x
3. Step 3: Cross multiply
   1,907.18x = 2,631.90 × 1,067.89
4. Step 4: Simplify right side
   1,907.18x = 2,810,579.69
5. Step 5: Solve for x
   x = 2,810,579.69/1,907.18
6. Step 6: Final answer
   x = 1,473.68