Finding the Fourth Proportional to 11,003.61, 16,504.95 and 7,909.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.61 : 16,504.95 = 7,909.47 : x
2. Step 2: Convert to fraction form
   11,003.61/16,504.95 = 7,909.47/x
3. Step 3: Cross multiply
   11,003.61x = 16,504.95 × 7,909.47
4. Step 4: Simplify right side
   11,003.61x = 130,545,406.88
5. Step 5: Solve for x
   x = 130,545,406.88/11,003.61
6. Step 6: Final answer
   x = 11,863.87