Finding the Fourth Proportional to 1,954.72, 2,931.03 and 857.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,954.72 : 2,931.03 = 857.82 : x
2. Step 2: Convert to fraction form
   1,954.72/2,931.03 = 857.82/x
3. Step 3: Cross multiply
   1,954.72x = 2,931.03 × 857.82
4. Step 4: Simplify right side
   1,954.72x = 2,514,296.15
5. Step 5: Solve for x
   x = 2,514,296.15/1,954.72
6. Step 6: Final answer
   x = 1,286.27