Finding the Third Proportional to 108,139 and 248,905

Step by Step Solution

1. Step 1: Write the proportion equation
   108,139 : 248,905 = 248,905 : x
2. Step 2: Convert to fraction form
   108,139/248,905 = 248,905/x
3. Step 3: Cross multiply
   108,139x = 248,905 × 248,905
4. Step 4: Simplify right side
   108,139x = 61,953,699,025
5. Step 5: Solve for x
   x = 61,953,699,025/108,139
6. Step 6: Final answer
   x = 572,908.01