Finding the Third Proportional to 21,105,664 and 31,534,253

Step by Step Solution

1. Step 1: Write the proportion equation
   21,105,664 : 31,534,253 = 31,534,253 : x
2. Step 2: Convert to fraction form
   21,105,664/31,534,253 = 31,534,253/x
3. Step 3: Cross multiply
   21,105,664x = 31,534,253 × 31,534,253
4. Step 4: Simplify right side
   21,105,664x = 994,409,112,268,009
5. Step 5: Solve for x
   x = 994,409,112,268,009/21,105,664
6. Step 6: Final answer
   x = 47,115,746.38