Finding the Fourth Proportional to 1,435.86, 2,151.22 and 871.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.86 : 2,151.22 = 871.97 : x
2. Step 2: Convert to fraction form
   1,435.86/2,151.22 = 871.97/x
3. Step 3: Cross multiply
   1,435.86x = 2,151.22 × 871.97
4. Step 4: Simplify right side
   1,435.86x = 1,875,786.37
5. Step 5: Solve for x
   x = 1,875,786.37/1,435.86
6. Step 6: Final answer
   x = 1,306.39