Finding the Third Proportional to 19,387,490 and 40,780,612

Step by Step Solution

1. Step 1: Write the proportion equation
   19,387,490 : 40,780,612 = 40,780,612 : x
2. Step 2: Convert to fraction form
   19,387,490/40,780,612 = 40,780,612/x
3. Step 3: Cross multiply
   19,387,490x = 40,780,612 × 40,780,612
4. Step 4: Simplify right side
   19,387,490x = 1,663,058,315,094,544
5. Step 5: Solve for x
   x = 1,663,058,315,094,544/19,387,490
6. Step 6: Final answer
   x = 85,779,970.23