Finding the Third Proportional to 90,031.50 and 188,674.31

Step by Step Solution

1. Step 1: Write the proportion equation
   90,031.50 : 188,674.31 = 188,674.31 : x
2. Step 2: Convert to fraction form
   90,031.50/188,674.31 = 188,674.31/x
3. Step 3: Cross multiply
   90,031.50x = 188,674.31 × 188,674.31
4. Step 4: Simplify right side
   90,031.50x = 35,597,996,197.35
5. Step 5: Solve for x
   x = 35,597,996,197.35/90,031.50
6. Step 6: Final answer
   x = 395,394.90