Finding the Fourth Proportional to 9,146.76, 12,622.76 and 5,167.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.76 : 12,622.76 = 5,167.90 : x
2. Step 2: Convert to fraction form
   9,146.76/12,622.76 = 5,167.90/x
3. Step 3: Cross multiply
   9,146.76x = 12,622.76 × 5,167.90
4. Step 4: Simplify right side
   9,146.76x = 65,233,161.40
5. Step 5: Solve for x
   x = 65,233,161.40/9,146.76
6. Step 6: Final answer
   x = 7,131.83