Finding the Third Proportional to 21,487,689 and 33,320,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,487,689 : 33,320,821.50 = 33,320,821.50 : x
2. Step 2: Convert to fraction form
   21,487,689/33,320,821.50 = 33,320,821.50/x
3. Step 3: Cross multiply
   21,487,689x = 33,320,821.50 × 33,320,821.50
4. Step 4: Simplify right side
   21,487,689x = 1,110,277,145,434,862.25
5. Step 5: Solve for x
   x = 1,110,277,145,434,862.25/21,487,689
6. Step 6: Final answer
   x = 51,670,384.16