Finding the Third Proportional to 5,390,142 and 8,076,909

Step by Step Solution

1. Step 1: Write the proportion equation
   5,390,142 : 8,076,909 = 8,076,909 : x
2. Step 2: Convert to fraction form
   5,390,142/8,076,909 = 8,076,909/x
3. Step 3: Cross multiply
   5,390,142x = 8,076,909 × 8,076,909
4. Step 4: Simplify right side
   5,390,142x = 65,236,458,994,281
5. Step 5: Solve for x
   x = 65,236,458,994,281/5,390,142
6. Step 6: Final answer
   x = 12,102,920.29