Finding the Fourth Proportional to 13,152.72, 18,147.78 and 7,846.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,152.72 : 18,147.78 = 7,846.50 : x
2. Step 2: Convert to fraction form
   13,152.72/18,147.78 = 7,846.50/x
3. Step 3: Cross multiply
   13,152.72x = 18,147.78 × 7,846.50
4. Step 4: Simplify right side
   13,152.72x = 142,396,555.77
5. Step 5: Solve for x
   x = 142,396,555.77/13,152.72
6. Step 6: Final answer
   x = 10,826.40