Finding the Third Proportional to 2,158.88 and 5,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.88 : 5,269.50 = 5,269.50 : x
2. Step 2: Convert to fraction form
   2,158.88/5,269.50 = 5,269.50/x
3. Step 3: Cross multiply
   2,158.88x = 5,269.50 × 5,269.50
4. Step 4: Simplify right side
   2,158.88x = 27,767,630.25
5. Step 5: Solve for x
   x = 27,767,630.25/2,158.88
6. Step 6: Final answer
   x = 12,862.08