Finding the Third Proportional to 2,458,261,307.21 and 5,406,851,670.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,458,261,307.21 : 5,406,851,670.82 = 5,406,851,670.82 : x
2. Step 2: Convert to fraction form
   2,458,261,307.21/5,406,851,670.82 = 5,406,851,670.82/x
3. Step 3: Cross multiply
   2,458,261,307.21x = 5,406,851,670.82 × 5,406,851,670.82
4. Step 4: Simplify right side
   2,458,261,307.21x = 29,234,044,990,249,021,440
5. Step 5: Solve for x
   x = 29,234,044,990,249,021,440/2,458,261,307.21
6. Step 6: Final answer
   x = 11,892,163,336.93