Finding the Fourth Proportional to 13,191.04, 19,789.76 and 3,957.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.04 : 19,789.76 = 3,957.04 : x
2. Step 2: Convert to fraction form
   13,191.04/19,789.76 = 3,957.04/x
3. Step 3: Cross multiply
   13,191.04x = 19,789.76 × 3,957.04
4. Step 4: Simplify right side
   13,191.04x = 78,308,871.91
5. Step 5: Solve for x
   x = 78,308,871.91/13,191.04
6. Step 6: Final answer
   x = 5,936.52