Finding the Fourth Proportional to 9,250.67, 12,851.51 and 9,164.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,250.67 : 12,851.51 = 9,164.21 : x
2. Step 2: Convert to fraction form
   9,250.67/12,851.51 = 9,164.21/x
3. Step 3: Cross multiply
   9,250.67x = 12,851.51 × 9,164.21
4. Step 4: Simplify right side
   9,250.67x = 117,773,826.38
5. Step 5: Solve for x
   x = 117,773,826.38/9,250.67
6. Step 6: Final answer
   x = 12,731.38