Finding the Third Proportional to 5,749.10 and 8,790.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,749.10 : 8,790.40 = 8,790.40 : x
2. Step 2: Convert to fraction form
   5,749.10/8,790.40 = 8,790.40/x
3. Step 3: Cross multiply
   5,749.10x = 8,790.40 × 8,790.40
4. Step 4: Simplify right side
   5,749.10x = 77,271,104.69
5. Step 5: Solve for x
   x = 77,271,104.69/5,749.10
6. Step 6: Final answer
   x = 13,440.55