Finding the Third Proportional to 3,867,312 and 8,507,904

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867,312 : 8,507,904 = 8,507,904 : x
2. Step 2: Convert to fraction form
   3,867,312/8,507,904 = 8,507,904/x
3. Step 3: Cross multiply
   3,867,312x = 8,507,904 × 8,507,904
4. Step 4: Simplify right side
   3,867,312x = 72,384,430,473,216
5. Step 5: Solve for x
   x = 72,384,430,473,216/3,867,312
6. Step 6: Final answer
   x = 18,716,987.53