Finding the Third Proportional to 21,008,972 and 45,698,908

Step by Step Solution

1. Step 1: Write the proportion equation
   21,008,972 : 45,698,908 = 45,698,908 : x
2. Step 2: Convert to fraction form
   21,008,972/45,698,908 = 45,698,908/x
3. Step 3: Cross multiply
   21,008,972x = 45,698,908 × 45,698,908
4. Step 4: Simplify right side
   21,008,972x = 2,088,390,192,392,464
5. Step 5: Solve for x
   x = 2,088,390,192,392,464/21,008,972
6. Step 6: Final answer
   x = 99,404,682.55