Finding the Third Proportional to 12,861 and 26,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861 : 26,079.50 = 26,079.50 : x
2. Step 2: Convert to fraction form
   12,861/26,079.50 = 26,079.50/x
3. Step 3: Cross multiply
   12,861x = 26,079.50 × 26,079.50
4. Step 4: Simplify right side
   12,861x = 680,140,320.25
5. Step 5: Solve for x
   x = 680,140,320.25/12,861
6. Step 6: Final answer
   x = 52,883.94