Finding the Third Proportional to 21,692,643 and 28,789,353

Step by Step Solution

1. Step 1: Write the proportion equation
   21,692,643 : 28,789,353 = 28,789,353 : x
2. Step 2: Convert to fraction form
   21,692,643/28,789,353 = 28,789,353/x
3. Step 3: Cross multiply
   21,692,643x = 28,789,353 × 28,789,353
4. Step 4: Simplify right side
   21,692,643x = 828,826,846,158,609
5. Step 5: Solve for x
   x = 828,826,846,158,609/21,692,643
6. Step 6: Final answer
   x = 38,207,739.19