Finding the Fourth Proportional to 9,146.09, 12,621.88 and 5,167.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.09 : 12,621.88 = 5,167.45 : x
2. Step 2: Convert to fraction form
   9,146.09/12,621.88 = 5,167.45/x
3. Step 3: Cross multiply
   9,146.09x = 12,621.88 × 5,167.45
4. Step 4: Simplify right side
   9,146.09x = 65,222,933.81
5. Step 5: Solve for x
   x = 65,222,933.81/9,146.09
6. Step 6: Final answer
   x = 7,131.24