Finding the Fourth Proportional to 11,645.91, 16,056.63 and 9,519.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,645.91 : 16,056.63 = 9,519.12 : x
2. Step 2: Convert to fraction form
   11,645.91/16,056.63 = 9,519.12/x
3. Step 3: Cross multiply
   11,645.91x = 16,056.63 × 9,519.12
4. Step 4: Simplify right side
   11,645.91x = 152,844,987.77
5. Step 5: Solve for x
   x = 152,844,987.77/11,645.91
6. Step 6: Final answer
   x = 13,124.35