Finding the Fourth Proportional to 23,050.24, 31,809.04 and 12,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,050.24 : 31,809.04 = 12,978.72 : x
2. Step 2: Convert to fraction form
   23,050.24/31,809.04 = 12,978.72/x
3. Step 3: Cross multiply
   23,050.24x = 31,809.04 × 12,978.72
4. Step 4: Simplify right side
   23,050.24x = 412,840,623.63
5. Step 5: Solve for x
   x = 412,840,623.63/23,050.24
6. Step 6: Final answer
   x = 17,910.47