Finding the Third Proportional to 9,415,692 and 19,961,280

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415,692 : 19,961,280 = 19,961,280 : x
2. Step 2: Convert to fraction form
   9,415,692/19,961,280 = 19,961,280/x
3. Step 3: Cross multiply
   9,415,692x = 19,961,280 × 19,961,280
4. Step 4: Simplify right side
   9,415,692x = 398,452,699,238,400
5. Step 5: Solve for x
   x = 398,452,699,238,400/9,415,692
6. Step 6: Final answer
   x = 42,317,941.08