Finding the Fourth Proportional to 9,321.17, 12,862.82 and 5,072.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.17 : 12,862.82 = 5,072.25 : x
2. Step 2: Convert to fraction form
   9,321.17/12,862.82 = 5,072.25/x
3. Step 3: Cross multiply
   9,321.17x = 12,862.82 × 5,072.25
4. Step 4: Simplify right side
   9,321.17x = 65,243,438.75
5. Step 5: Solve for x
   x = 65,243,438.75/9,321.17
6. Step 6: Final answer
   x = 6,999.49