Finding the Fourth Proportional to 13,529.64, 18,665.61 and 7,863.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,529.64 : 18,665.61 = 7,863.38 : x
2. Step 2: Convert to fraction form
   13,529.64/18,665.61 = 7,863.38/x
3. Step 3: Cross multiply
   13,529.64x = 18,665.61 × 7,863.38
4. Step 4: Simplify right side
   13,529.64x = 146,774,797.89
5. Step 5: Solve for x
   x = 146,774,797.89/13,529.64
6. Step 6: Final answer
   x = 10,848.39