Finding the Fourth Proportional to 9,189.11, 12,680.59 and 5,412.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.11 : 12,680.59 = 5,412.43 : x
2. Step 2: Convert to fraction form
   9,189.11/12,680.59 = 5,412.43/x
3. Step 3: Cross multiply
   9,189.11x = 12,680.59 × 5,412.43
4. Step 4: Simplify right side
   9,189.11x = 68,632,715.27
5. Step 5: Solve for x
   x = 68,632,715.27/9,189.11
6. Step 6: Final answer
   x = 7,468.92