Finding the Fourth Proportional to 13,386.14, 18,472.86 and 7,418.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,386.14 : 18,472.86 = 7,418.18 : x
2. Step 2: Convert to fraction form
   13,386.14/18,472.86 = 7,418.18/x
3. Step 3: Cross multiply
   13,386.14x = 18,472.86 × 7,418.18
4. Step 4: Simplify right side
   13,386.14x = 137,035,000.59
5. Step 5: Solve for x
   x = 137,035,000.59/13,386.14
6. Step 6: Final answer
   x = 10,237.08