Finding the Third Proportional to 139,788,688 and 218,809,383

Step by Step Solution

1. Step 1: Write the proportion equation
   139,788,688 : 218,809,383 = 218,809,383 : x
2. Step 2: Convert to fraction form
   139,788,688/218,809,383 = 218,809,383/x
3. Step 3: Cross multiply
   139,788,688x = 218,809,383 × 218,809,383
4. Step 4: Simplify right side
   139,788,688x = 47,877,546,088,840,688
5. Step 5: Solve for x
   x = 47,877,546,088,840,688/139,788,688
6. Step 6: Final answer
   x = 342,499,430.92