Finding the Fourth Proportional to 11,776.80, 16,243.52 and 7,581.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,776.80 : 16,243.52 = 7,581.04 : x
2. Step 2: Convert to fraction form
   11,776.80/16,243.52 = 7,581.04/x
3. Step 3: Cross multiply
   11,776.80x = 16,243.52 × 7,581.04
4. Step 4: Simplify right side
   11,776.80x = 123,142,774.86
5. Step 5: Solve for x
   x = 123,142,774.86/11,776.80
6. Step 6: Final answer
   x = 10,456.39