Finding the Third Proportional to 3,908,212 and 8,611,536

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908,212 : 8,611,536 = 8,611,536 : x
2. Step 2: Convert to fraction form
   3,908,212/8,611,536 = 8,611,536/x
3. Step 3: Cross multiply
   3,908,212x = 8,611,536 × 8,611,536
4. Step 4: Simplify right side
   3,908,212x = 74,158,552,279,296
5. Step 5: Solve for x
   x = 74,158,552,279,296/3,908,212
6. Step 6: Final answer
   x = 18,975,058.74