Finding the Fourth Proportional to 21,105,958.89, 31,664,396.67 and 12,359,623.97

Step by Step Solution

1. Step 1: Write the proportion equation
   21,105,958.89 : 31,664,396.67 = 12,359,623.97 : x
2. Step 2: Convert to fraction form
   21,105,958.89/31,664,396.67 = 12,359,623.97/x
3. Step 3: Cross multiply
   21,105,958.89x = 31,664,396.67 × 12,359,623.97
4. Step 4: Simplify right side
   21,105,958.89x = 391,360,036,180,455.50
5. Step 5: Solve for x
   x = 391,360,036,180,455.50/21,105,958.89
6. Step 6: Final answer
   x = 18,542,632.35