Finding the Fourth Proportional to 23,148.63, 31,945.08 and 12,538.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,148.63 : 31,945.08 = 12,538.30 : x
2. Step 2: Convert to fraction form
   23,148.63/31,945.08 = 12,538.30/x
3. Step 3: Cross multiply
   23,148.63x = 31,945.08 × 12,538.30
4. Step 4: Simplify right side
   23,148.63x = 400,536,996.56
5. Step 5: Solve for x
   x = 400,536,996.56/23,148.63
6. Step 6: Final answer
   x = 17,302.84