Finding the Fourth Proportional to 9,164.46, 12,646.56 and 5,185.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,164.46 : 12,646.56 = 5,185.64 : x
2. Step 2: Convert to fraction form
   9,164.46/12,646.56 = 5,185.64/x
3. Step 3: Cross multiply
   9,164.46x = 12,646.56 × 5,185.64
4. Step 4: Simplify right side
   9,164.46x = 65,580,507.40
5. Step 5: Solve for x
   x = 65,580,507.40/9,164.46
6. Step 6: Final answer
   x = 7,155.96