Finding the Fourth Proportional to 14,216.31, 19,618.61 and 7,929.09

Step by Step Solution

1. Step 1: Write the proportion equation
   14,216.31 : 19,618.61 = 7,929.09 : x
2. Step 2: Convert to fraction form
   14,216.31/19,618.61 = 7,929.09/x
3. Step 3: Cross multiply
   14,216.31x = 19,618.61 × 7,929.09
4. Step 4: Simplify right side
   14,216.31x = 155,557,684.72
5. Step 5: Solve for x
   x = 155,557,684.72/14,216.31
6. Step 6: Final answer
   x = 10,942.20