Finding the Fourth Proportional to 12,380.37, 17,075.37 and 8,603.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.37 : 17,075.37 = 8,603.47 : x
2. Step 2: Convert to fraction form
   12,380.37/17,075.37 = 8,603.47/x
3. Step 3: Cross multiply
   12,380.37x = 17,075.37 × 8,603.47
4. Step 4: Simplify right side
   12,380.37x = 146,907,433.53
5. Step 5: Solve for x
   x = 146,907,433.53/12,380.37
6. Step 6: Final answer
   x = 11,866.16