Finding the Third Proportional to 5,621.91 and 8,402.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,621.91 : 8,402.48 = 8,402.48 : x
2. Step 2: Convert to fraction form
   5,621.91/8,402.48 = 8,402.48/x
3. Step 3: Cross multiply
   5,621.91x = 8,402.48 × 8,402.48
4. Step 4: Simplify right side
   5,621.91x = 70,601,743.67
5. Step 5: Solve for x
   x = 70,601,743.67/5,621.91
6. Step 6: Final answer
   x = 12,558.33