Finding the Fourth Proportional to 22,406.14, 30,918.67 and 12,975.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,406.14 : 30,918.67 = 12,975.31 : x
2. Step 2: Convert to fraction form
   22,406.14/30,918.67 = 12,975.31/x
3. Step 3: Cross multiply
   22,406.14x = 30,918.67 × 12,975.31
4. Step 4: Simplify right side
   22,406.14x = 401,179,328.04
5. Step 5: Solve for x
   x = 401,179,328.04/22,406.14
6. Step 6: Final answer
   x = 17,904.88