Finding the Fourth Proportional to 13,139,172.56, 18,000,365.14 and 12,647,935.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,172.56 : 18,000,365.14 = 12,647,935.04 : x
2. Step 2: Convert to fraction form
   13,139,172.56/18,000,365.14 = 12,647,935.04/x
3. Step 3: Cross multiply
   13,139,172.56x = 18,000,365.14 × 12,647,935.04
4. Step 4: Simplify right side
   13,139,172.56x = 227,667,448,987,000.50
5. Step 5: Solve for x
   x = 227,667,448,987,000.50/13,139,172.56
6. Step 6: Final answer
   x = 17,327,381.00