Finding the Fourth Proportional to 13,143.72, 19,715.40 and 3,282.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,143.72 : 19,715.40 = 3,282.96 : x
2. Step 2: Convert to fraction form
   13,143.72/19,715.40 = 3,282.96/x
3. Step 3: Cross multiply
   13,143.72x = 19,715.40 × 3,282.96
4. Step 4: Simplify right side
   13,143.72x = 64,724,869.58
5. Step 5: Solve for x
   x = 64,724,869.58/13,143.72
6. Step 6: Final answer
   x = 4,924.40