Finding the Third Proportional to 117,812 and 245,558

Step by Step Solution

1. Step 1: Write the proportion equation
   117,812 : 245,558 = 245,558 : x
2. Step 2: Convert to fraction form
   117,812/245,558 = 245,558/x
3. Step 3: Cross multiply
   117,812x = 245,558 × 245,558
4. Step 4: Simplify right side
   117,812x = 60,298,731,364
5. Step 5: Solve for x
   x = 60,298,731,364/117,812
6. Step 6: Final answer
   x = 511,821.64