Finding the Fourth Proportional to 23,148.94, 31,945.50 and 12,538.57

Step by Step Solution

1. Step 1: Write the proportion equation
   23,148.94 : 31,945.50 = 12,538.57 : x
2. Step 2: Convert to fraction form
   23,148.94/31,945.50 = 12,538.57/x
3. Step 3: Cross multiply
   23,148.94x = 31,945.50 × 12,538.57
4. Step 4: Simplify right side
   23,148.94x = 400,550,887.94
5. Step 5: Solve for x
   x = 400,550,887.94/23,148.94
6. Step 6: Final answer
   x = 17,303.21