Finding the Fourth Proportional to 12,429.69, 17,153.01 and 6,840.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.69 : 17,153.01 = 6,840.69 : x
2. Step 2: Convert to fraction form
   12,429.69/17,153.01 = 6,840.69/x
3. Step 3: Cross multiply
   12,429.69x = 17,153.01 × 6,840.69
4. Step 4: Simplify right side
   12,429.69x = 117,338,389.77
5. Step 5: Solve for x
   x = 117,338,389.77/12,429.69
6. Step 6: Final answer
   x = 9,440.17