Finding the Third Proportional to 8,427,990 and 18,134,280

Step by Step Solution

1. Step 1: Write the proportion equation
   8,427,990 : 18,134,280 = 18,134,280 : x
2. Step 2: Convert to fraction form
   8,427,990/18,134,280 = 18,134,280/x
3. Step 3: Cross multiply
   8,427,990x = 18,134,280 × 18,134,280
4. Step 4: Simplify right side
   8,427,990x = 328,852,111,118,400
5. Step 5: Solve for x
   x = 328,852,111,118,400/8,427,990
6. Step 6: Final answer
   x = 39,019,043.82