Finding the Third Proportional to 21,051,156 and 31,491,040

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051,156 : 31,491,040 = 31,491,040 : x
2. Step 2: Convert to fraction form
   21,051,156/31,491,040 = 31,491,040/x
3. Step 3: Cross multiply
   21,051,156x = 31,491,040 × 31,491,040
4. Step 4: Simplify right side
   21,051,156x = 991,685,600,281,600
5. Step 5: Solve for x
   x = 991,685,600,281,600/21,051,156
6. Step 6: Final answer
   x = 47,108,367.84