Finding the Fourth Proportional to 19,607.89, 29,417.33 and 7,929.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,607.89 : 29,417.33 = 7,929.31 : x
2. Step 2: Convert to fraction form
   19,607.89/29,417.33 = 7,929.31/x
3. Step 3: Cross multiply
   19,607.89x = 29,417.33 × 7,929.31
4. Step 4: Simplify right side
   19,607.89x = 233,259,089.30
5. Step 5: Solve for x
   x = 233,259,089.30/19,607.89
6. Step 6: Final answer
   x = 11,896.19