Finding the Fourth Proportional to 17,145.48, 23,665.52 and 9,976.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,145.48 : 23,665.52 = 9,976.78 : x
2. Step 2: Convert to fraction form
   17,145.48/23,665.52 = 9,976.78/x
3. Step 3: Cross multiply
   17,145.48x = 23,665.52 × 9,976.78
4. Step 4: Simplify right side
   17,145.48x = 236,105,518.41
5. Step 5: Solve for x
   x = 236,105,518.41/17,145.48
6. Step 6: Final answer
   x = 13,770.71