Finding the Fourth Proportional to 14,123.86, 19,485.72 and 8,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,123.86 : 19,485.72 = 8,458.72 : x
2. Step 2: Convert to fraction form
   14,123.86/19,485.72 = 8,458.72/x
3. Step 3: Cross multiply
   14,123.86x = 19,485.72 × 8,458.72
4. Step 4: Simplify right side
   14,123.86x = 164,824,249.48
5. Step 5: Solve for x
   x = 164,824,249.48/14,123.86
6. Step 6: Final answer
   x = 11,669.92