Finding the Third Proportional to 12,820.13 and 27,690.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.13 : 27,690.56 = 27,690.56 : x
2. Step 2: Convert to fraction form
   12,820.13/27,690.56 = 27,690.56/x
3. Step 3: Cross multiply
   12,820.13x = 27,690.56 × 27,690.56
4. Step 4: Simplify right side
   12,820.13x = 766,767,251.57
5. Step 5: Solve for x
   x = 766,767,251.57/12,820.13
6. Step 6: Final answer
   x = 59,809.65