Finding the Third Proportional to 4,139,520 and 9,048,576

Step by Step Solution

1. Step 1: Write the proportion equation
   4,139,520 : 9,048,576 = 9,048,576 : x
2. Step 2: Convert to fraction form
   4,139,520/9,048,576 = 9,048,576/x
3. Step 3: Cross multiply
   4,139,520x = 9,048,576 × 9,048,576
4. Step 4: Simplify right side
   4,139,520x = 81,876,727,627,776
5. Step 5: Solve for x
   x = 81,876,727,627,776/4,139,520
6. Step 6: Final answer
   x = 19,779,280.60