Finding the Third Proportional to 12,880 and 27,931

Step by Step Solution

1. Step 1: Write the proportion equation
   12,880 : 27,931 = 27,931 : x
2. Step 2: Convert to fraction form
   12,880/27,931 = 27,931/x
3. Step 3: Cross multiply
   12,880x = 27,931 × 27,931
4. Step 4: Simplify right side
   12,880x = 780,140,761
5. Step 5: Solve for x
   x = 780,140,761/12,880
6. Step 6: Final answer
   x = 60,569.93