Finding the Third Proportional to 2,786.63 and 4,328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,786.63 : 4,328.72 = 4,328.72 : x
2. Step 2: Convert to fraction form
   2,786.63/4,328.72 = 4,328.72/x
3. Step 3: Cross multiply
   2,786.63x = 4,328.72 × 4,328.72
4. Step 4: Simplify right side
   2,786.63x = 18,737,806.02
5. Step 5: Solve for x
   x = 18,737,806.02/2,786.63
6. Step 6: Final answer
   x = 6,724.19