Finding the Fourth Proportional to 13,863.52, 20,782.56 and 5,091.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,863.52 : 20,782.56 = 5,091.76 : x
2. Step 2: Convert to fraction form
   13,863.52/20,782.56 = 5,091.76/x
3. Step 3: Cross multiply
   13,863.52x = 20,782.56 × 5,091.76
4. Step 4: Simplify right side
   13,863.52x = 105,819,807.71
5. Step 5: Solve for x
   x = 105,819,807.71/13,863.52
6. Step 6: Final answer
   x = 7,632.97