Finding the Fourth Proportional to 2,884.07, 4,326.20 and 909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,884.07 : 4,326.20 = 909.72 : x
2. Step 2: Convert to fraction form
   2,884.07/4,326.20 = 909.72/x
3. Step 3: Cross multiply
   2,884.07x = 4,326.20 × 909.72
4. Step 4: Simplify right side
   2,884.07x = 3,935,609.89
5. Step 5: Solve for x
   x = 3,935,609.89/2,884.07
6. Step 6: Final answer
   x = 1,364.60