Finding the Third Proportional to 21,051,158 and 31,491,043

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051,158 : 31,491,043 = 31,491,043 : x
2. Step 2: Convert to fraction form
   21,051,158/31,491,043 = 31,491,043/x
3. Step 3: Cross multiply
   21,051,158x = 31,491,043 × 31,491,043
4. Step 4: Simplify right side
   21,051,158x = 991,685,789,227,849
5. Step 5: Solve for x
   x = 991,685,789,227,849/21,051,158
6. Step 6: Final answer
   x = 47,108,372.34