Finding the Third Proportional to 6,387,761,886 and 13,900,329,458

Step by Step Solution

1. Step 1: Write the proportion equation
   6,387,761,886 : 13,900,329,458 = 13,900,329,458 : x
2. Step 2: Convert to fraction form
   6,387,761,886/13,900,329,458 = 13,900,329,458/x
3. Step 3: Cross multiply
   6,387,761,886x = 13,900,329,458 × 13,900,329,458
4. Step 4: Simplify right side
   6,387,761,886x = 193,219,159,040,942,571,520
5. Step 5: Solve for x
   x = 193,219,159,040,942,571,520/6,387,761,886
6. Step 6: Final answer
   x = 30,248,334,626.31