Finding the Fourth Proportional to 23,128.93, 31,918.02 and 12,518.56

Step by Step Solution

1. Step 1: Write the proportion equation
   23,128.93 : 31,918.02 = 12,518.56 : x
2. Step 2: Convert to fraction form
   23,128.93/31,918.02 = 12,518.56/x
3. Step 3: Cross multiply
   23,128.93x = 31,918.02 × 12,518.56
4. Step 4: Simplify right side
   23,128.93x = 399,567,648.45
5. Step 5: Solve for x
   x = 399,567,648.45/23,128.93
6. Step 6: Final answer
   x = 17,275.67