Finding the Fourth Proportional to 13,158.78, 18,150.63 and 7,849.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,158.78 : 18,150.63 = 7,849.50 : x
2. Step 2: Convert to fraction form
   13,158.78/18,150.63 = 7,849.50/x
3. Step 3: Cross multiply
   13,158.78x = 18,150.63 × 7,849.50
4. Step 4: Simplify right side
   13,158.78x = 142,473,370.19
5. Step 5: Solve for x
   x = 142,473,370.19/13,158.78
6. Step 6: Final answer
   x = 10,827.25