Finding the Fourth Proportional to 12,380.78, 17,086.39 and 7,075.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.78 : 17,086.39 = 7,075.48 : x
2. Step 2: Convert to fraction form
   12,380.78/17,086.39 = 7,075.48/x
3. Step 3: Cross multiply
   12,380.78x = 17,086.39 × 7,075.48
4. Step 4: Simplify right side
   12,380.78x = 120,894,410.72
5. Step 5: Solve for x
   x = 120,894,410.72/12,380.78
6. Step 6: Final answer
   x = 9,764.68