Finding the Fourth Proportional to 11,996.88, 17,990.98 and 5,071.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,996.88 : 17,990.98 = 5,071.92 : x
2. Step 2: Convert to fraction form
   11,996.88/17,990.98 = 5,071.92/x
3. Step 3: Cross multiply
   11,996.88x = 17,990.98 × 5,071.92
4. Step 4: Simplify right side
   11,996.88x = 91,248,811.28
5. Step 5: Solve for x
   x = 91,248,811.28/11,996.88
6. Step 6: Final answer
   x = 7,606.05