Finding the Third Proportional to 4,090,972 and 8,900,208

Step by Step Solution

1. Step 1: Write the proportion equation
   4,090,972 : 8,900,208 = 8,900,208 : x
2. Step 2: Convert to fraction form
   4,090,972/8,900,208 = 8,900,208/x
3. Step 3: Cross multiply
   4,090,972x = 8,900,208 × 8,900,208
4. Step 4: Simplify right side
   4,090,972x = 79,213,702,443,264
5. Step 5: Solve for x
   x = 79,213,702,443,264/4,090,972
6. Step 6: Final answer
   x = 19,363,051.73