Finding the Fourth Proportional to 11,114.78, 16,685.18 and 8,776.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,114.78 : 16,685.18 = 8,776.36 : x
2. Step 2: Convert to fraction form
   11,114.78/16,685.18 = 8,776.36/x
3. Step 3: Cross multiply
   11,114.78x = 16,685.18 × 8,776.36
4. Step 4: Simplify right side
   11,114.78x = 146,435,111.74
5. Step 5: Solve for x
   x = 146,435,111.74/11,114.78
6. Step 6: Final answer
   x = 13,174.82