Finding the Third Proportional to 21,320,859 and 30,386,560.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,320,859 : 30,386,560.50 = 30,386,560.50 : x
2. Step 2: Convert to fraction form
   21,320,859/30,386,560.50 = 30,386,560.50/x
3. Step 3: Cross multiply
   21,320,859x = 30,386,560.50 × 30,386,560.50
4. Step 4: Simplify right side
   21,320,859x = 923,343,059,020,160.25
5. Step 5: Solve for x
   x = 923,343,059,020,160.25/21,320,859
6. Step 6: Final answer
   x = 43,307,029.00