Finding the Fourth Proportional to 13,109.42, 18,073.31 and 12,701.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.42 : 18,073.31 = 12,701.74 : x
2. Step 2: Convert to fraction form
   13,109.42/18,073.31 = 12,701.74/x
3. Step 3: Cross multiply
   13,109.42x = 18,073.31 × 12,701.74
4. Step 4: Simplify right side
   13,109.42x = 229,562,484.56
5. Step 5: Solve for x
   x = 229,562,484.56/13,109.42
6. Step 6: Final answer
   x = 17,511.26