Finding the Fourth Proportional to 10,802.78, 14,914.71 and 8,818.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,802.78 : 14,914.71 = 8,818.05 : x
2. Step 2: Convert to fraction form
   10,802.78/14,914.71 = 8,818.05/x
3. Step 3: Cross multiply
   10,802.78x = 14,914.71 × 8,818.05
4. Step 4: Simplify right side
   10,802.78x = 131,518,658.52
5. Step 5: Solve for x
   x = 131,518,658.52/10,802.78
6. Step 6: Final answer
   x = 12,174.53