Finding the Fourth Proportional to 12,480.83, 17,226.43 and 7,178.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.83 : 17,226.43 = 7,178.70 : x
2. Step 2: Convert to fraction form
   12,480.83/17,226.43 = 7,178.70/x
3. Step 3: Cross multiply
   12,480.83x = 17,226.43 × 7,178.70
4. Step 4: Simplify right side
   12,480.83x = 123,663,373.04
5. Step 5: Solve for x
   x = 123,663,373.04/12,480.83
6. Step 6: Final answer
   x = 9,908.27