Finding the Fourth Proportional to 12,619.42, 17,421.78 and 7,584.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,619.42 : 17,421.78 = 7,584.88 : x
2. Step 2: Convert to fraction form
   12,619.42/17,421.78 = 7,584.88/x
3. Step 3: Cross multiply
   12,619.42x = 17,421.78 × 7,584.88
4. Step 4: Simplify right side
   12,619.42x = 132,142,110.69
5. Step 5: Solve for x
   x = 132,142,110.69/12,619.42
6. Step 6: Final answer
   x = 10,471.33