Finding the Fourth Proportional to 11,990.02, 16,548.15 and 8,643.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990.02 : 16,548.15 = 8,643.91 : x
2. Step 2: Convert to fraction form
   11,990.02/16,548.15 = 8,643.91/x
3. Step 3: Cross multiply
   11,990.02x = 16,548.15 × 8,643.91
4. Step 4: Simplify right side
   11,990.02x = 143,040,719.27
5. Step 5: Solve for x
   x = 143,040,719.27/11,990.02
6. Step 6: Final answer
   x = 11,929.98