Finding the Third Proportional to 2,181,312 and 4,665,888

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181,312 : 4,665,888 = 4,665,888 : x
2. Step 2: Convert to fraction form
   2,181,312/4,665,888 = 4,665,888/x
3. Step 3: Cross multiply
   2,181,312x = 4,665,888 × 4,665,888
4. Step 4: Simplify right side
   2,181,312x = 21,770,510,828,544
5. Step 5: Solve for x
   x = 21,770,510,828,544/2,181,312
6. Step 6: Final answer
   x = 9,980,466.26