Finding the Fourth Proportional to 1,530.09, 2,112.21 and 940.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.09 : 2,112.21 = 940.82 : x
2. Step 2: Convert to fraction form
   1,530.09/2,112.21 = 940.82/x
3. Step 3: Cross multiply
   1,530.09x = 2,112.21 × 940.82
4. Step 4: Simplify right side
   1,530.09x = 1,987,198.85
5. Step 5: Solve for x
   x = 1,987,198.85/1,530.09
6. Step 6: Final answer
   x = 1,298.75