Finding the Fourth Proportional to 9,412.55, 12,989.46 and 5,164.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,412.55 : 12,989.46 = 5,164.03 : x
2. Step 2: Convert to fraction form
   9,412.55/12,989.46 = 5,164.03/x
3. Step 3: Cross multiply
   9,412.55x = 12,989.46 × 5,164.03
4. Step 4: Simplify right side
   9,412.55x = 67,077,961.12
5. Step 5: Solve for x
   x = 67,077,961.12/9,412.55
6. Step 6: Final answer
   x = 7,126.44