Finding the Third Proportional to 12,621.38 and 27,690.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.38 : 27,690.63 = 27,690.63 : x
2. Step 2: Convert to fraction form
   12,621.38/27,690.63 = 27,690.63/x
3. Step 3: Cross multiply
   12,621.38x = 27,690.63 × 27,690.63
4. Step 4: Simplify right side
   12,621.38x = 766,770,712.89
5. Step 5: Solve for x
   x = 766,770,712.89/12,621.38
6. Step 6: Final answer
   x = 60,751.76