Finding the Fourth Proportional to 13,139,172.06, 18,000,364.46 and 12,647,934.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,172.06 : 18,000,364.46 = 12,647,934.54 : x
2. Step 2: Convert to fraction form
   13,139,172.06/18,000,364.46 = 12,647,934.54/x
3. Step 3: Cross multiply
   13,139,172.06x = 18,000,364.46 × 12,647,934.54
4. Step 4: Simplify right side
   13,139,172.06x = 227,667,431,322,982.75
5. Step 5: Solve for x
   x = 227,667,431,322,982.75/13,139,172.06
6. Step 6: Final answer
   x = 17,327,380.32