Finding the Fourth Proportional to 13,139,196.41, 18,000,398.94 and 12,647,959.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,196.41 : 18,000,398.94 = 12,647,959.76 : x
2. Step 2: Convert to fraction form
   13,139,196.41/18,000,398.94 = 12,647,959.76/x
3. Step 3: Cross multiply
   13,139,196.41x = 18,000,398.94 × 12,647,959.76
4. Step 4: Simplify right side
   13,139,196.41x = 227,668,321,414,494.53
5. Step 5: Solve for x
   x = 227,668,321,414,494.53/13,139,196.41
6. Step 6: Final answer
   x = 17,327,415.95