Finding the Fourth Proportional to 9,146.16, 12,621.70 and 5,167.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.16 : 12,621.70 = 5,167.54 : x
2. Step 2: Convert to fraction form
   9,146.16/12,621.70 = 5,167.54/x
3. Step 3: Cross multiply
   9,146.16x = 12,621.70 × 5,167.54
4. Step 4: Simplify right side
   9,146.16x = 65,223,139.62
5. Step 5: Solve for x
   x = 65,223,139.62/9,146.16
6. Step 6: Final answer
   x = 7,131.20