Finding the Third Proportional to 4,121,136 and 8,928,288

Step by Step Solution

1. Step 1: Write the proportion equation
   4,121,136 : 8,928,288 = 8,928,288 : x
2. Step 2: Convert to fraction form
   4,121,136/8,928,288 = 8,928,288/x
3. Step 3: Cross multiply
   4,121,136x = 8,928,288 × 8,928,288
4. Step 4: Simplify right side
   4,121,136x = 79,714,326,610,944
5. Step 5: Solve for x
   x = 79,714,326,610,944/4,121,136
6. Step 6: Final answer
   x = 19,342,804.17