Finding the Fourth Proportional to 2,101.86, 3,154.20 and 869.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.86 : 3,154.20 = 869.25 : x
2. Step 2: Convert to fraction form
   2,101.86/3,154.20 = 869.25/x
3. Step 3: Cross multiply
   2,101.86x = 3,154.20 × 869.25
4. Step 4: Simplify right side
   2,101.86x = 2,741,788.35
5. Step 5: Solve for x
   x = 2,741,788.35/2,101.86
6. Step 6: Final answer
   x = 1,304.46