Finding the Fourth Proportional to 12,385.62, 17,093.56 and 8,607.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.62 : 17,093.56 = 8,607.78 : x
2. Step 2: Convert to fraction form
   12,385.62/17,093.56 = 8,607.78/x
3. Step 3: Cross multiply
   12,385.62x = 17,093.56 × 8,607.78
4. Step 4: Simplify right side
   12,385.62x = 147,137,603.90
5. Step 5: Solve for x
   x = 147,137,603.90/12,385.62
6. Step 6: Final answer
   x = 11,879.71