Finding the Fourth Proportional to 1,379.47, 2,067.18 and 1,031.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.47 : 2,067.18 = 1,031.17 : x
2. Step 2: Convert to fraction form
   1,379.47/2,067.18 = 1,031.17/x
3. Step 3: Cross multiply
   1,379.47x = 2,067.18 × 1,031.17
4. Step 4: Simplify right side
   1,379.47x = 2,131,614.00
5. Step 5: Solve for x
   x = 2,131,614.00/1,379.47
6. Step 6: Final answer
   x = 1,545.24