Finding the Third Proportional to 90,479.50 and 178,688

Step by Step Solution

1. Step 1: Write the proportion equation
   90,479.50 : 178,688 = 178,688 : x
2. Step 2: Convert to fraction form
   90,479.50/178,688 = 178,688/x
3. Step 3: Cross multiply
   90,479.50x = 178,688 × 178,688
4. Step 4: Simplify right side
   90,479.50x = 31,929,401,344
5. Step 5: Solve for x
   x = 31,929,401,344/90,479.50
6. Step 6: Final answer
   x = 352,891.00