Finding the Third Proportional to 9,929,129 and 21,426,526

Step by Step Solution

1. Step 1: Write the proportion equation
   9,929,129 : 21,426,526 = 21,426,526 : x
2. Step 2: Convert to fraction form
   9,929,129/21,426,526 = 21,426,526/x
3. Step 3: Cross multiply
   9,929,129x = 21,426,526 × 21,426,526
4. Step 4: Simplify right side
   9,929,129x = 459,096,016,428,676
5. Step 5: Solve for x
   x = 459,096,016,428,676/9,929,129
6. Step 6: Final answer
   x = 46,237,289.94