Finding the Fourth Proportional to 12,443.16, 17,171.52 and 6,777.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.16 : 17,171.52 = 6,777.80 : x
2. Step 2: Convert to fraction form
   12,443.16/17,171.52 = 6,777.80/x
3. Step 3: Cross multiply
   12,443.16x = 17,171.52 × 6,777.80
4. Step 4: Simplify right side
   12,443.16x = 116,385,128.26
5. Step 5: Solve for x
   x = 116,385,128.26/12,443.16
6. Step 6: Final answer
   x = 9,353.34