Finding the Third Proportional to 11,929,721.50 and 18,920,558.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,929,721.50 : 18,920,558.50 = 18,920,558.50 : x
2. Step 2: Convert to fraction form
   11,929,721.50/18,920,558.50 = 18,920,558.50/x
3. Step 3: Cross multiply
   11,929,721.50x = 18,920,558.50 × 18,920,558.50
4. Step 4: Simplify right side
   11,929,721.50x = 357,987,533,951,922.25
5. Step 5: Solve for x
   x = 357,987,533,951,922.25/11,929,721.50
6. Step 6: Final answer
   x = 30,008,037.82