Finding the Third Proportional to 12,861 and 28,089

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861 : 28,089 = 28,089 : x
2. Step 2: Convert to fraction form
   12,861/28,089 = 28,089/x
3. Step 3: Cross multiply
   12,861x = 28,089 × 28,089
4. Step 4: Simplify right side
   12,861x = 788,991,921
5. Step 5: Solve for x
   x = 788,991,921/12,861
6. Step 6: Final answer
   x = 61,347.63