Finding the Fourth Proportional to 23,051.48, 31,811.76 and 12,980.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,051.48 : 31,811.76 = 12,980.12 : x
2. Step 2: Convert to fraction form
   23,051.48/31,811.76 = 12,980.12/x
3. Step 3: Cross multiply
   23,051.48x = 31,811.76 × 12,980.12
4. Step 4: Simplify right side
   23,051.48x = 412,920,303.15
5. Step 5: Solve for x
   x = 412,920,303.15/23,051.48
6. Step 6: Final answer
   x = 17,912.97