Finding the Third Proportional to 9,167,846,985 and 19,642,640,958

Step by Step Solution

1. Step 1: Write the proportion equation
   9,167,846,985 : 19,642,640,958 = 19,642,640,958 : x
2. Step 2: Convert to fraction form
   9,167,846,985/19,642,640,958 = 19,642,640,958/x
3. Step 3: Cross multiply
   9,167,846,985x = 19,642,640,958 × 19,642,640,958
4. Step 4: Simplify right side
   9,167,846,985x = 385,833,343,804,899,131,392
5. Step 5: Solve for x
   x = 385,833,343,804,899,131,392/9,167,846,985
6. Step 6: Final answer
   x = 42,085,491,221.24