Finding the Third Proportional to 5,509,980 and 12,866,737.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,509,980 : 12,866,737.50 = 12,866,737.50 : x
2. Step 2: Convert to fraction form
   5,509,980/12,866,737.50 = 12,866,737.50/x
3. Step 3: Cross multiply
   5,509,980x = 12,866,737.50 × 12,866,737.50
4. Step 4: Simplify right side
   5,509,980x = 165,552,933,893,906.25
5. Step 5: Solve for x
   x = 165,552,933,893,906.25/5,509,980
6. Step 6: Final answer
   x = 30,046,013.58