Finding the Third Proportional to 103,456,021.50 and 172,419,799.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,456,021.50 : 172,419,799.50 = 172,419,799.50 : x
2. Step 2: Convert to fraction form
   103,456,021.50/172,419,799.50 = 172,419,799.50/x
3. Step 3: Cross multiply
   103,456,021.50x = 172,419,799.50 × 172,419,799.50
4. Step 4: Simplify right side
   103,456,021.50x = 29,728,587,259,620,200
5. Step 5: Solve for x
   x = 29,728,587,259,620,200/103,456,021.50
6. Step 6: Final answer
   x = 287,354,827.96