Finding the Fourth Proportional to 11,939.55, 17,911.98 and 3,934.68

Step by Step Solution

1. Step 1: Write the proportion equation
   11,939.55 : 17,911.98 = 3,934.68 : x
2. Step 2: Convert to fraction form
   11,939.55/17,911.98 = 3,934.68/x
3. Step 3: Cross multiply
   11,939.55x = 17,911.98 × 3,934.68
4. Step 4: Simplify right side
   11,939.55x = 70,477,909.47
5. Step 5: Solve for x
   x = 70,477,909.47/11,939.55
6. Step 6: Final answer
   x = 5,902.89