Finding the Fourth Proportional to 13,111.94, 19,653.57 and 8,174.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.94 : 19,653.57 = 8,174.79 : x
2. Step 2: Convert to fraction form
   13,111.94/19,653.57 = 8,174.79/x
3. Step 3: Cross multiply
   13,111.94x = 19,653.57 × 8,174.79
4. Step 4: Simplify right side
   13,111.94x = 160,663,807.50
5. Step 5: Solve for x
   x = 160,663,807.50/13,111.94
6. Step 6: Final answer
   x = 12,253.24