Finding the Fourth Proportional to 9,321.50, 12,863.08 and 5,072.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.50 : 12,863.08 = 5,072.52 : x
2. Step 2: Convert to fraction form
   9,321.50/12,863.08 = 5,072.52/x
3. Step 3: Cross multiply
   9,321.50x = 12,863.08 × 5,072.52
4. Step 4: Simplify right side
   9,321.50x = 65,248,230.56
5. Step 5: Solve for x
   x = 65,248,230.56/9,321.50
6. Step 6: Final answer
   x = 6,999.76