Finding the Fourth Proportional to 23,172.94, 31,978.70 and 12,562.62

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.94 : 31,978.70 = 12,562.62 : x
2. Step 2: Convert to fraction form
   23,172.94/31,978.70 = 12,562.62/x
3. Step 3: Cross multiply
   23,172.94x = 31,978.70 × 12,562.62
4. Step 4: Simplify right side
   23,172.94x = 401,736,256.19
5. Step 5: Solve for x
   x = 401,736,256.19/23,172.94
6. Step 6: Final answer
   x = 17,336.44