Finding the Third Proportional to 5,509,873 and 12,866,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,509,873 : 12,866,456.50 = 12,866,456.50 : x
2. Step 2: Convert to fraction form
   5,509,873/12,866,456.50 = 12,866,456.50/x
3. Step 3: Cross multiply
   5,509,873x = 12,866,456.50 × 12,866,456.50
4. Step 4: Simplify right side
   5,509,873x = 165,545,702,866,392.25
5. Step 5: Solve for x
   x = 165,545,702,866,392.25/5,509,873
6. Step 6: Final answer
   x = 30,045,284.69