Finding the Third Proportional to 19,781,740 and 42,176,378

Step by Step Solution

1. Step 1: Write the proportion equation
   19,781,740 : 42,176,378 = 42,176,378 : x
2. Step 2: Convert to fraction form
   19,781,740/42,176,378 = 42,176,378/x
3. Step 3: Cross multiply
   19,781,740x = 42,176,378 × 42,176,378
4. Step 4: Simplify right side
   19,781,740x = 1,778,846,861,198,884
5. Step 5: Solve for x
   x = 1,778,846,861,198,884/19,781,740
6. Step 6: Final answer
   x = 89,923,680.18