Finding the Third Proportional to 3,920,913 and 8,493,210

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920,913 : 8,493,210 = 8,493,210 : x
2. Step 2: Convert to fraction form
   3,920,913/8,493,210 = 8,493,210/x
3. Step 3: Cross multiply
   3,920,913x = 8,493,210 × 8,493,210
4. Step 4: Simplify right side
   3,920,913x = 72,134,616,104,100
5. Step 5: Solve for x
   x = 72,134,616,104,100/3,920,913
6. Step 6: Final answer
   x = 18,397,402.88