Finding the Third Proportional to 3,842,858 and 8,316,865

Step by Step Solution

1. Step 1: Write the proportion equation
   3,842,858 : 8,316,865 = 8,316,865 : x
2. Step 2: Convert to fraction form
   3,842,858/8,316,865 = 8,316,865/x
3. Step 3: Cross multiply
   3,842,858x = 8,316,865 × 8,316,865
4. Step 4: Simplify right side
   3,842,858x = 69,170,243,428,225
5. Step 5: Solve for x
   x = 69,170,243,428,225/3,842,858
6. Step 6: Final answer
   x = 17,999,687.58