Finding the Fourth Proportional to 11,990.72, 17,998.88 and 10,612.84

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990.72 : 17,998.88 = 10,612.84 : x
2. Step 2: Convert to fraction form
   11,990.72/17,998.88 = 10,612.84/x
3. Step 3: Cross multiply
   11,990.72x = 17,998.88 × 10,612.84
4. Step 4: Simplify right side
   11,990.72x = 191,019,233.62
5. Step 5: Solve for x
   x = 191,019,233.62/11,990.72
6. Step 6: Final answer
   x = 15,930.59