Finding the Third Proportional to 12,888 and 31,236

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888 : 31,236 = 31,236 : x
2. Step 2: Convert to fraction form
   12,888/31,236 = 31,236/x
3. Step 3: Cross multiply
   12,888x = 31,236 × 31,236
4. Step 4: Simplify right side
   12,888x = 975,687,696
5. Step 5: Solve for x
   x = 975,687,696/12,888
6. Step 6: Final answer
   x = 75,705.13