Finding the Fourth Proportional to 9,321.44, 12,863.82 and 5,072.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.44 : 12,863.82 = 5,072.74 : x
2. Step 2: Convert to fraction form
   9,321.44/12,863.82 = 5,072.74/x
3. Step 3: Cross multiply
   9,321.44x = 12,863.82 × 5,072.74
4. Step 4: Simplify right side
   9,321.44x = 65,254,749.95
5. Step 5: Solve for x
   x = 65,254,749.95/9,321.44
6. Step 6: Final answer
   x = 7,000.50