Finding the Third Proportional to 21,687,356 and 28,913,250

Step by Step Solution

1. Step 1: Write the proportion equation
   21,687,356 : 28,913,250 = 28,913,250 : x
2. Step 2: Convert to fraction form
   21,687,356/28,913,250 = 28,913,250/x
3. Step 3: Cross multiply
   21,687,356x = 28,913,250 × 28,913,250
4. Step 4: Simplify right side
   21,687,356x = 835,976,025,562,500
5. Step 5: Solve for x
   x = 835,976,025,562,500/21,687,356
6. Step 6: Final answer
   x = 38,546,700.92