Finding the Fourth Proportional to 9,189.64, 12,682.83 and 5,412.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189.64 : 12,682.83 = 5,412.61 : x
2. Step 2: Convert to fraction form
   9,189.64/12,682.83 = 5,412.61/x
3. Step 3: Cross multiply
   9,189.64x = 12,682.83 × 5,412.61
4. Step 4: Simplify right side
   9,189.64x = 68,647,212.49
5. Step 5: Solve for x
   x = 68,647,212.49/9,189.64
6. Step 6: Final answer
   x = 7,470.07