Finding the Fourth Proportional to 12,659.50, 17,455.89 and 8,177.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,659.50 : 17,455.89 = 8,177.34 : x
2. Step 2: Convert to fraction form
   12,659.50/17,455.89 = 8,177.34/x
3. Step 3: Cross multiply
   12,659.50x = 17,455.89 × 8,177.34
4. Step 4: Simplify right side
   12,659.50x = 142,742,747.53
5. Step 5: Solve for x
   x = 142,742,747.53/12,659.50
6. Step 6: Final answer
   x = 11,275.54