Finding the Third Proportional to 89,316 and 178,631

Step by Step Solution

1. Step 1: Write the proportion equation
   89,316 : 178,631 = 178,631 : x
2. Step 2: Convert to fraction form
   89,316/178,631 = 178,631/x
3. Step 3: Cross multiply
   89,316x = 178,631 × 178,631
4. Step 4: Simplify right side
   89,316x = 31,909,034,161
5. Step 5: Solve for x
   x = 31,909,034,161/89,316
6. Step 6: Final answer
   x = 357,260.00