Finding the Third Proportional to 5,213.11 and 10,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,213.11 : 10,790.72 = 10,790.72 : x
2. Step 2: Convert to fraction form
   5,213.11/10,790.72 = 10,790.72/x
3. Step 3: Cross multiply
   5,213.11x = 10,790.72 × 10,790.72
4. Step 4: Simplify right side
   5,213.11x = 116,439,611.14
5. Step 5: Solve for x
   x = 116,439,611.14/5,213.11
6. Step 6: Final answer
   x = 22,335.92