Finding the Fourth Proportional to 16,763, 23,131.20 and 9,691.68

Step by Step Solution

1. Step 1: Write the proportion equation
   16,763 : 23,131.20 = 9,691.68 : x
2. Step 2: Convert to fraction form
   16,763/23,131.20 = 9,691.68/x
3. Step 3: Cross multiply
   16,763x = 23,131.20 × 9,691.68
4. Step 4: Simplify right side
   16,763x = 224,180,188.42
5. Step 5: Solve for x
   x = 224,180,188.42/16,763
6. Step 6: Final answer
   x = 13,373.51