Finding the Third Proportional to 4,276,686 and 8,856,516

Step by Step Solution

1. Step 1: Write the proportion equation
   4,276,686 : 8,856,516 = 8,856,516 : x
2. Step 2: Convert to fraction form
   4,276,686/8,856,516 = 8,856,516/x
3. Step 3: Cross multiply
   4,276,686x = 8,856,516 × 8,856,516
4. Step 4: Simplify right side
   4,276,686x = 78,437,875,658,256
5. Step 5: Solve for x
   x = 78,437,875,658,256/4,276,686
6. Step 6: Final answer
   x = 18,340,807.73