Finding the Third Proportional to 3,657,818 and 8,039,665

Step by Step Solution

1. Step 1: Write the proportion equation
   3,657,818 : 8,039,665 = 8,039,665 : x
2. Step 2: Convert to fraction form
   3,657,818/8,039,665 = 8,039,665/x
3. Step 3: Cross multiply
   3,657,818x = 8,039,665 × 8,039,665
4. Step 4: Simplify right side
   3,657,818x = 64,636,213,312,225
5. Step 5: Solve for x
   x = 64,636,213,312,225/3,657,818
6. Step 6: Final answer
   x = 17,670,702.40