Finding the Fourth Proportional to 13,706.31, 18,914.72 and 7,418.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,706.31 : 18,914.72 = 7,418.69 : x
2. Step 2: Convert to fraction form
   13,706.31/18,914.72 = 7,418.69/x
3. Step 3: Cross multiply
   13,706.31x = 18,914.72 × 7,418.69
4. Step 4: Simplify right side
   13,706.31x = 140,322,383.38
5. Step 5: Solve for x
   x = 140,322,383.38/13,706.31
6. Step 6: Final answer
   x = 10,237.79