Finding the Fourth Proportional to 9,321.62, 12,863.88 and 5,072.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.62 : 12,863.88 = 5,072.76 : x
2. Step 2: Convert to fraction form
   9,321.62/12,863.88 = 5,072.76/x
3. Step 3: Cross multiply
   9,321.62x = 12,863.88 × 5,072.76
4. Step 4: Simplify right side
   9,321.62x = 65,255,375.91
5. Step 5: Solve for x
   x = 65,255,375.91/9,321.62
6. Step 6: Final answer
   x = 7,000.44