Finding the Fourth Proportional to 12,818.75, 17,663.60 and 9,456.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.75 : 17,663.60 = 9,456.23 : x
2. Step 2: Convert to fraction form
   12,818.75/17,663.60 = 9,456.23/x
3. Step 3: Cross multiply
   12,818.75x = 17,663.60 × 9,456.23
4. Step 4: Simplify right side
   12,818.75x = 167,030,928.63
5. Step 5: Solve for x
   x = 167,030,928.63/12,818.75
6. Step 6: Final answer
   x = 13,030.21