Finding the Fourth Proportional to 23,121.01, 31,906.86 and 13,052.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,121.01 : 31,906.86 = 13,052.72 : x
2. Step 2: Convert to fraction form
   23,121.01/31,906.86 = 13,052.72/x
3. Step 3: Cross multiply
   23,121.01x = 31,906.86 × 13,052.72
4. Step 4: Simplify right side
   23,121.01x = 416,471,309.66
5. Step 5: Solve for x
   x = 416,471,309.66/23,121.01
6. Step 6: Final answer
   x = 18,012.68