Finding the Third Proportional to 2,485,897,965 and 5,385,559,242

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485,897,965 : 5,385,559,242 = 5,385,559,242 : x
2. Step 2: Convert to fraction form
   2,485,897,965/5,385,559,242 = 5,385,559,242/x
3. Step 3: Cross multiply
   2,485,897,965x = 5,385,559,242 × 5,385,559,242
4. Step 4: Simplify right side
   2,485,897,965x = 29,004,248,349,091,614,720
5. Step 5: Solve for x
   x = 29,004,248,349,091,614,720/2,485,897,965
6. Step 6: Final answer
   x = 11,667,513,613.77