Finding the Fourth Proportional to 22,389.26, 30,900.02 and 12,956.00

Step by Step Solution

1. Step 1: Write the proportion equation
   22,389.26 : 30,900.02 = 12,956.00 : x
2. Step 2: Convert to fraction form
   22,389.26/30,900.02 = 12,956.00/x
3. Step 3: Cross multiply
   22,389.26x = 30,900.02 × 12,956.00
4. Step 4: Simplify right side
   22,389.26x = 400,340,439.84
5. Step 5: Solve for x
   x = 400,340,439.84/22,389.26
6. Step 6: Final answer
   x = 17,880.92