Finding the Fourth Proportional to 1,910.03, 2,864.72 and 869.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.03 : 2,864.72 = 869.79 : x
2. Step 2: Convert to fraction form
   1,910.03/2,864.72 = 869.79/x
3. Step 3: Cross multiply
   1,910.03x = 2,864.72 × 869.79
4. Step 4: Simplify right side
   1,910.03x = 2,491,696.72
5. Step 5: Solve for x
   x = 2,491,696.72/1,910.03
6. Step 6: Final answer
   x = 1,304.53