Finding the Fourth Proportional to 13,158.86, 19,746.52 and 8,238.11

Step by Step Solution

1. Step 1: Write the proportion equation
   13,158.86 : 19,746.52 = 8,238.11 : x
2. Step 2: Convert to fraction form
   13,158.86/19,746.52 = 8,238.11/x
3. Step 3: Cross multiply
   13,158.86x = 19,746.52 × 8,238.11
4. Step 4: Simplify right side
   13,158.86x = 162,673,884.55
5. Step 5: Solve for x
   x = 162,673,884.55/13,158.86
6. Step 6: Final answer
   x = 12,362.31