Finding the Third Proportional to 3,861,390 and 5,238,321

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861,390 : 5,238,321 = 5,238,321 : x
2. Step 2: Convert to fraction form
   3,861,390/5,238,321 = 5,238,321/x
3. Step 3: Cross multiply
   3,861,390x = 5,238,321 × 5,238,321
4. Step 4: Simplify right side
   3,861,390x = 27,440,006,899,041
5. Step 5: Solve for x
   x = 27,440,006,899,041/3,861,390
6. Step 6: Final answer
   x = 7,106,251.09