Finding the Fourth Proportional to 13,182.72, 19,776.96 and 3,948

Step by Step Solution

1. Step 1: Write the proportion equation
   13,182.72 : 19,776.96 = 3,948 : x
2. Step 2: Convert to fraction form
   13,182.72/19,776.96 = 3,948/x
3. Step 3: Cross multiply
   13,182.72x = 19,776.96 × 3,948
4. Step 4: Simplify right side
   13,182.72x = 78,079,438.08
5. Step 5: Solve for x
   x = 78,079,438.08/13,182.72
6. Step 6: Final answer
   x = 5,922.86