Finding the Fourth Proportional to 21,790,105.52, 30,069,178.56 and 11,998,638.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,790,105.52 : 30,069,178.56 = 11,998,638.59 : x
2. Step 2: Convert to fraction form
   21,790,105.52/30,069,178.56 = 11,998,638.59/x
3. Step 3: Cross multiply
   21,790,105.52x = 30,069,178.56 × 11,998,638.59
4. Step 4: Simplify right side
   21,790,105.52x = 360,789,206,089,270.75
5. Step 5: Solve for x
   x = 360,789,206,089,270.75/21,790,105.52
6. Step 6: Final answer
   x = 16,557,478.62