Finding the Third Proportional to 14,917,990 and 21,056,630

Step by Step Solution

1. Step 1: Write the proportion equation
   14,917,990 : 21,056,630 = 21,056,630 : x
2. Step 2: Convert to fraction form
   14,917,990/21,056,630 = 21,056,630/x
3. Step 3: Cross multiply
   14,917,990x = 21,056,630 × 21,056,630
4. Step 4: Simplify right side
   14,917,990x = 443,381,666,956,900
5. Step 5: Solve for x
   x = 443,381,666,956,900/14,917,990
6. Step 6: Final answer
   x = 29,721,273.91