Finding the Third Proportional to 3,915,294 and 8,601,789

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915,294 : 8,601,789 = 8,601,789 : x
2. Step 2: Convert to fraction form
   3,915,294/8,601,789 = 8,601,789/x
3. Step 3: Cross multiply
   3,915,294x = 8,601,789 × 8,601,789
4. Step 4: Simplify right side
   3,915,294x = 73,990,774,000,521
5. Step 5: Solve for x
   x = 73,990,774,000,521/3,915,294
6. Step 6: Final answer
   x = 18,897,884.55