Finding the Fourth Proportional to 12,914.69, 17,828.17 and 9,929.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,914.69 : 17,828.17 = 9,929.48 : x
2. Step 2: Convert to fraction form
   12,914.69/17,828.17 = 9,929.48/x
3. Step 3: Cross multiply
   12,914.69x = 17,828.17 × 9,929.48
4. Step 4: Simplify right side
   12,914.69x = 177,024,343.49
5. Step 5: Solve for x
   x = 177,024,343.49/12,914.69
6. Step 6: Final answer
   x = 13,707.21