Finding the Fourth Proportional to 12,480.12, 17,225.52 and 7,178

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.12 : 17,225.52 = 7,178 : x
2. Step 2: Convert to fraction form
   12,480.12/17,225.52 = 7,178/x
3. Step 3: Cross multiply
   12,480.12x = 17,225.52 × 7,178
4. Step 4: Simplify right side
   12,480.12x = 123,644,782.56
5. Step 5: Solve for x
   x = 123,644,782.56/12,480.12
6. Step 6: Final answer
   x = 9,907.34