Finding the Fourth Proportional to 8,840.78, 12,212.69 and 8,042.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,840.78 : 12,212.69 = 8,042.69 : x
2. Step 2: Convert to fraction form
   8,840.78/12,212.69 = 8,042.69/x
3. Step 3: Cross multiply
   8,840.78x = 12,212.69 × 8,042.69
4. Step 4: Simplify right side
   8,840.78x = 98,222,881.36
5. Step 5: Solve for x
   x = 98,222,881.36/8,840.78
6. Step 6: Final answer
   x = 11,110.21