Finding the Fourth Proportional to 11,997.01, 17,958.61 and 7,828.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,997.01 : 17,958.61 = 7,828.04 : x
2. Step 2: Convert to fraction form
   11,997.01/17,958.61 = 7,828.04/x
3. Step 3: Cross multiply
   11,997.01x = 17,958.61 × 7,828.04
4. Step 4: Simplify right side
   11,997.01x = 140,580,717.42
5. Step 5: Solve for x
   x = 140,580,717.42/11,997.01
6. Step 6: Final answer
   x = 11,717.98