Finding the Fourth Proportional to 11,810.80, 16,296.50 and 8,977.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,810.80 : 16,296.50 = 8,977.42 : x
2. Step 2: Convert to fraction form
   11,810.80/16,296.50 = 8,977.42/x
3. Step 3: Cross multiply
   11,810.80x = 16,296.50 × 8,977.42
4. Step 4: Simplify right side
   11,810.80x = 146,300,525.03
5. Step 5: Solve for x
   x = 146,300,525.03/11,810.80
6. Step 6: Final answer
   x = 12,387.01