Finding the Fourth Proportional to 8,887.39, 12,265.32 and 5,111.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,887.39 : 12,265.32 = 5,111.78 : x
2. Step 2: Convert to fraction form
   8,887.39/12,265.32 = 5,111.78/x
3. Step 3: Cross multiply
   8,887.39x = 12,265.32 × 5,111.78
4. Step 4: Simplify right side
   8,887.39x = 62,697,556.14
5. Step 5: Solve for x
   x = 62,697,556.14/8,887.39
6. Step 6: Final answer
   x = 7,054.67