Finding the Fourth Proportional to 39,662.50, 59,496.18 and 11,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,662.50 : 59,496.18 = 11,960.50 : x
2. Step 2: Convert to fraction form
   39,662.50/59,496.18 = 11,960.50/x
3. Step 3: Cross multiply
   39,662.50x = 59,496.18 × 11,960.50
4. Step 4: Simplify right side
   39,662.50x = 711,604,060.89
5. Step 5: Solve for x
   x = 711,604,060.89/39,662.50
6. Step 6: Final answer
   x = 17,941.48