Finding the Fourth Proportional to 13,139,518.86, 18,000,839.82 and 12,648,282.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,518.86 : 18,000,839.82 = 12,648,282.18 : x
2. Step 2: Convert to fraction form
   13,139,518.86/18,000,839.82 = 12,648,282.18/x
3. Step 3: Cross multiply
   13,139,518.86x = 18,000,839.82 × 12,648,282.18
4. Step 4: Simplify right side
   13,139,518.86x = 227,679,701,520,340.41
5. Step 5: Solve for x
   x = 227,679,701,520,340.41/13,139,518.86
6. Step 6: Final answer
   x = 17,327,856.82