Finding the Fourth Proportional to 9,146.81, 12,621.98 and 5,167.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.81 : 12,621.98 = 5,167.68 : x
2. Step 2: Convert to fraction form
   9,146.81/12,621.98 = 5,167.68/x
3. Step 3: Cross multiply
   9,146.81x = 12,621.98 × 5,167.68
4. Step 4: Simplify right side
   9,146.81x = 65,226,327.77
5. Step 5: Solve for x
   x = 65,226,327.77/9,146.81
6. Step 6: Final answer
   x = 7,131.05