Finding the Third Proportional to 5,509,872 and 12,866,454

Step by Step Solution

1. Step 1: Write the proportion equation
   5,509,872 : 12,866,454 = 12,866,454 : x
2. Step 2: Convert to fraction form
   5,509,872/12,866,454 = 12,866,454/x
3. Step 3: Cross multiply
   5,509,872x = 12,866,454 × 12,866,454
4. Step 4: Simplify right side
   5,509,872x = 165,545,638,534,116
5. Step 5: Solve for x
   x = 165,545,638,534,116/5,509,872
6. Step 6: Final answer
   x = 30,045,278.46