Finding the Third Proportional to 2,558,888,898 and 3,931,449,978

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558,888,898 : 3,931,449,978 = 3,931,449,978 : x
2. Step 2: Convert to fraction form
   2,558,888,898/3,931,449,978 = 3,931,449,978/x
3. Step 3: Cross multiply
   2,558,888,898x = 3,931,449,978 × 3,931,449,978
4. Step 4: Simplify right side
   2,558,888,898x = 15,456,298,929,516,199,936
5. Step 5: Solve for x
   x = 15,456,298,929,516,199,936/2,558,888,898
6. Step 6: Final answer
   x = 6,040,238,379.09