Finding the Third Proportional to 90,663.47 and 213,262.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,663.47 : 213,262.88 = 213,262.88 : x
2. Step 2: Convert to fraction form
   90,663.47/213,262.88 = 213,262.88/x
3. Step 3: Cross multiply
   90,663.47x = 213,262.88 × 213,262.88
4. Step 4: Simplify right side
   90,663.47x = 45,481,053,853.27
5. Step 5: Solve for x
   x = 45,481,053,853.27/90,663.47
6. Step 6: Final answer
   x = 501,646.96