Finding the Fourth Proportional to 9,146.39, 12,621.32 and 5,167.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.39 : 12,621.32 = 5,167.87 : x
2. Step 2: Convert to fraction form
   9,146.39/12,621.32 = 5,167.87/x
3. Step 3: Cross multiply
   9,146.39x = 12,621.32 × 5,167.87
4. Step 4: Simplify right side
   9,146.39x = 65,225,302.98
5. Step 5: Solve for x
   x = 65,225,302.98/9,146.39
6. Step 6: Final answer
   x = 7,131.27