Finding the Fourth Proportional to 17,378.82, 23,981.64 and 9,721.86

Step by Step Solution

1. Step 1: Write the proportion equation
   17,378.82 : 23,981.64 = 9,721.86 : x
2. Step 2: Convert to fraction form
   17,378.82/23,981.64 = 9,721.86/x
3. Step 3: Cross multiply
   17,378.82x = 23,981.64 × 9,721.86
4. Step 4: Simplify right side
   17,378.82x = 233,146,146.65
5. Step 5: Solve for x
   x = 233,146,146.65/17,378.82
6. Step 6: Final answer
   x = 13,415.53