Finding the Fourth Proportional to 11,909.41, 16,440.50 and 7,131.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,909.41 : 16,440.50 = 7,131.62 : x
2. Step 2: Convert to fraction form
   11,909.41/16,440.50 = 7,131.62/x
3. Step 3: Cross multiply
   11,909.41x = 16,440.50 × 7,131.62
4. Step 4: Simplify right side
   11,909.41x = 117,247,398.61
5. Step 5: Solve for x
   x = 117,247,398.61/11,909.41
6. Step 6: Final answer
   x = 9,844.94