Finding the Third Proportional to 20,429,791,817 and 28,757,112,218

Step by Step Solution

1. Step 1: Write the proportion equation
   20,429,791,817 : 28,757,112,218 = 28,757,112,218 : x
2. Step 2: Convert to fraction form
   20,429,791,817/28,757,112,218 = 28,757,112,218/x
3. Step 3: Cross multiply
   20,429,791,817x = 28,757,112,218 × 28,757,112,218
4. Step 4: Simplify right side
   20,429,791,817x = 826,971,503,118,644,936,704
5. Step 5: Solve for x
   x = 826,971,503,118,644,936,704/20,429,791,817
6. Step 6: Final answer
   x = 40,478,704,361.07