Finding the Fourth Proportional to 13,147.50, 18,145.26 and 7,558.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.50 : 18,145.26 = 7,558.50 : x
2. Step 2: Convert to fraction form
   13,147.50/18,145.26 = 7,558.50/x
3. Step 3: Cross multiply
   13,147.50x = 18,145.26 × 7,558.50
4. Step 4: Simplify right side
   13,147.50x = 137,150,947.71
5. Step 5: Solve for x
   x = 137,150,947.71/13,147.50
6. Step 6: Final answer
   x = 10,431.71