Finding the Third Proportional to 86,316 and 178,624.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,316 : 178,624.50 = 178,624.50 : x
2. Step 2: Convert to fraction form
   86,316/178,624.50 = 178,624.50/x
3. Step 3: Cross multiply
   86,316x = 178,624.50 × 178,624.50
4. Step 4: Simplify right side
   86,316x = 31,906,712,000.25
5. Step 5: Solve for x
   x = 31,906,712,000.25/86,316
6. Step 6: Final answer
   x = 369,650.03