Finding the Third Proportional to 115,863 and 253,870

Step by Step Solution

1. Step 1: Write the proportion equation
   115,863 : 253,870 = 253,870 : x
2. Step 2: Convert to fraction form
   115,863/253,870 = 253,870/x
3. Step 3: Cross multiply
   115,863x = 253,870 × 253,870
4. Step 4: Simplify right side
   115,863x = 64,449,976,900
5. Step 5: Solve for x
   x = 64,449,976,900/115,863
6. Step 6: Final answer
   x = 556,260.21