Finding the Fourth Proportional to 23,056.96, 31,812.18 and 12,984.80

Step by Step Solution

1. Step 1: Write the proportion equation
   23,056.96 : 31,812.18 = 12,984.80 : x
2. Step 2: Convert to fraction form
   23,056.96/31,812.18 = 12,984.80/x
3. Step 3: Cross multiply
   23,056.96x = 31,812.18 × 12,984.80
4. Step 4: Simplify right side
   23,056.96x = 413,074,794.86
5. Step 5: Solve for x
   x = 413,074,794.86/23,056.96
6. Step 6: Final answer
   x = 17,915.41