Finding the Fourth Proportional to 19,608.89, 29,418.83 and 7,930.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,608.89 : 29,418.83 = 7,930.31 : x
2. Step 2: Convert to fraction form
   19,608.89/29,418.83 = 7,930.31/x
3. Step 3: Cross multiply
   19,608.89x = 29,418.83 × 7,930.31
4. Step 4: Simplify right side
   19,608.89x = 233,300,441.74
5. Step 5: Solve for x
   x = 233,300,441.74/19,608.89
6. Step 6: Final answer
   x = 11,897.69