Finding the Third Proportional to 4,276,688 and 8,856,520

Step by Step Solution

1. Step 1: Write the proportion equation
   4,276,688 : 8,856,520 = 8,856,520 : x
2. Step 2: Convert to fraction form
   4,276,688/8,856,520 = 8,856,520/x
3. Step 3: Cross multiply
   4,276,688x = 8,856,520 × 8,856,520
4. Step 4: Simplify right side
   4,276,688x = 78,437,946,510,400
5. Step 5: Solve for x
   x = 78,437,946,510,400/4,276,688
6. Step 6: Final answer
   x = 18,340,815.72