Finding the Fourth Proportional to 9,146.32, 12,621.36 and 5,167.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.32 : 12,621.36 = 5,167.60 : x
2. Step 2: Convert to fraction form
   9,146.32/12,621.36 = 5,167.60/x
3. Step 3: Cross multiply
   9,146.32x = 12,621.36 × 5,167.60
4. Step 4: Simplify right side
   9,146.32x = 65,222,139.94
5. Step 5: Solve for x
   x = 65,222,139.94/9,146.32
6. Step 6: Final answer
   x = 7,130.97