Finding the Third Proportional to 123,858 and 263,700

Step by Step Solution

1. Step 1: Write the proportion equation
   123,858 : 263,700 = 263,700 : x
2. Step 2: Convert to fraction form
   123,858/263,700 = 263,700/x
3. Step 3: Cross multiply
   123,858x = 263,700 × 263,700
4. Step 4: Simplify right side
   123,858x = 69,537,690,000
5. Step 5: Solve for x
   x = 69,537,690,000/123,858
6. Step 6: Final answer
   x = 561,430.75