Finding the Fourth Proportional to 12,478.95, 17,223.84 and 7,176.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.95 : 17,223.84 = 7,176.83 : x
2. Step 2: Convert to fraction form
   12,478.95/17,223.84 = 7,176.83/x
3. Step 3: Cross multiply
   12,478.95x = 17,223.84 × 7,176.83
4. Step 4: Simplify right side
   12,478.95x = 123,612,485.51
5. Step 5: Solve for x
   x = 123,612,485.51/12,478.95
6. Step 6: Final answer
   x = 9,905.68