Finding the Third Proportional to 298,651,857,507 and 436,639,458,978

Step by Step Solution

1. Step 1: Write the proportion equation
   298,651,857,507 : 436,639,458,978 = 436,639,458,978 : x
2. Step 2: Convert to fraction form
   298,651,857,507/436,639,458,978 = 436,639,458,978/x
3. Step 3: Cross multiply
   298,651,857,507x = 436,639,458,978 × 436,639,458,978
4. Step 4: Simplify right side
   298,651,857,507x = 190,654,017,136,600,538,939,392
5. Step 5: Solve for x
   x = 190,654,017,136,600,538,939,392/298,651,857,507
6. Step 6: Final answer
   x = 638,382,157,499.66