Finding the Fourth Proportional to 13,182.72, 19,776.64 and 3,948.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,182.72 : 19,776.64 = 3,948.80 : x
2. Step 2: Convert to fraction form
   13,182.72/19,776.64 = 3,948.80/x
3. Step 3: Cross multiply
   13,182.72x = 19,776.64 × 3,948.80
4. Step 4: Simplify right side
   13,182.72x = 78,093,996.03
5. Step 5: Solve for x
   x = 78,093,996.03/13,182.72
6. Step 6: Final answer
   x = 5,923.97