Finding the Third Proportional to 3,790,209 and 8,218,776

Step by Step Solution

1. Step 1: Write the proportion equation
   3,790,209 : 8,218,776 = 8,218,776 : x
2. Step 2: Convert to fraction form
   3,790,209/8,218,776 = 8,218,776/x
3. Step 3: Cross multiply
   3,790,209x = 8,218,776 × 8,218,776
4. Step 4: Simplify right side
   3,790,209x = 67,548,278,938,176
5. Step 5: Solve for x
   x = 67,548,278,938,176/3,790,209
6. Step 6: Final answer
   x = 17,821,782.11