Finding the Fourth Proportional to 11,442.18, 15,777.72 and 9,936.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,442.18 : 15,777.72 = 9,936.81 : x
2. Step 2: Convert to fraction form
   11,442.18/15,777.72 = 9,936.81/x
3. Step 3: Cross multiply
   11,442.18x = 15,777.72 × 9,936.81
4. Step 4: Simplify right side
   11,442.18x = 156,780,205.87
5. Step 5: Solve for x
   x = 156,780,205.87/11,442.18
6. Step 6: Final answer
   x = 13,701.95