Finding the Fourth Proportional to 21,796,722.50, 30,080,410.18 and 12,138,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796,722.50 : 30,080,410.18 = 12,138,930.50 : x
2. Step 2: Convert to fraction form
   21,796,722.50/30,080,410.18 = 12,138,930.50/x
3. Step 3: Cross multiply
   21,796,722.50x = 30,080,410.18 × 12,138,930.50
4. Step 4: Simplify right side
   21,796,722.50x = 365,144,008,586,512.50
5. Step 5: Solve for x
   x = 365,144,008,586,512.50/21,796,722.50
6. Step 6: Final answer
   x = 16,752,243.76