Finding the Third Proportional to 3,785,872 and 8,210,516

Step by Step Solution

1. Step 1: Write the proportion equation
   3,785,872 : 8,210,516 = 8,210,516 : x
2. Step 2: Convert to fraction form
   3,785,872/8,210,516 = 8,210,516/x
3. Step 3: Cross multiply
   3,785,872x = 8,210,516 × 8,210,516
4. Step 4: Simplify right side
   3,785,872x = 67,412,572,986,256
5. Step 5: Solve for x
   x = 67,412,572,986,256/3,785,872
6. Step 6: Final answer
   x = 17,806,352.93