Finding the Fourth Proportional to 1,906.91, 2,631.40 and 1,067.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.91 : 2,631.40 = 1,067.42 : x
2. Step 2: Convert to fraction form
   1,906.91/2,631.40 = 1,067.42/x
3. Step 3: Cross multiply
   1,906.91x = 2,631.40 × 1,067.42
4. Step 4: Simplify right side
   1,906.91x = 2,808,803.65
5. Step 5: Solve for x
   x = 2,808,803.65/1,906.91
6. Step 6: Final answer
   x = 1,472.96