Finding the Third Proportional to 12,520 and 26,978

Step by Step Solution

1. Step 1: Write the proportion equation
   12,520 : 26,978 = 26,978 : x
2. Step 2: Convert to fraction form
   12,520/26,978 = 26,978/x
3. Step 3: Cross multiply
   12,520x = 26,978 × 26,978
4. Step 4: Simplify right side
   12,520x = 727,812,484
5. Step 5: Solve for x
   x = 727,812,484/12,520
6. Step 6: Final answer
   x = 58,131.99