Finding the Fourth Proportional to 13,308.71, 19,964.86 and 3,948.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.71 : 19,964.86 = 3,948.86 : x
2. Step 2: Convert to fraction form
   13,308.71/19,964.86 = 3,948.86/x
3. Step 3: Cross multiply
   13,308.71x = 19,964.86 × 3,948.86
4. Step 4: Simplify right side
   13,308.71x = 78,838,477.10
5. Step 5: Solve for x
   x = 78,838,477.10/13,308.71
6. Step 6: Final answer
   x = 5,923.82