Finding the Fourth Proportional to 22,189.16, 30,619.62 and 12,758.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,189.16 : 30,619.62 = 12,758.12 : x
2. Step 2: Convert to fraction form
   22,189.16/30,619.62 = 12,758.12/x
3. Step 3: Cross multiply
   22,189.16x = 30,619.62 × 12,758.12
4. Step 4: Simplify right side
   22,189.16x = 390,648,786.31
5. Step 5: Solve for x
   x = 390,648,786.31/22,189.16
6. Step 6: Final answer
   x = 17,605.39