Finding the Third Proportional to 9,121,874 and 19,831,468

Step by Step Solution

1. Step 1: Write the proportion equation
   9,121,874 : 19,831,468 = 19,831,468 : x
2. Step 2: Convert to fraction form
   9,121,874/19,831,468 = 19,831,468/x
3. Step 3: Cross multiply
   9,121,874x = 19,831,468 × 19,831,468
4. Step 4: Simplify right side
   9,121,874x = 393,287,123,035,024
5. Step 5: Solve for x
   x = 393,287,123,035,024/9,121,874
6. Step 6: Final answer
   x = 43,114,728.73