Finding the Third Proportional to 21,298,248 and 30,456,729

Step by Step Solution

1. Step 1: Write the proportion equation
   21,298,248 : 30,456,729 = 30,456,729 : x
2. Step 2: Convert to fraction form
   21,298,248/30,456,729 = 30,456,729/x
3. Step 3: Cross multiply
   21,298,248x = 30,456,729 × 30,456,729
4. Step 4: Simplify right side
   21,298,248x = 927,612,341,379,441
5. Step 5: Solve for x
   x = 927,612,341,379,441/21,298,248
6. Step 6: Final answer
   x = 43,553,457.61