Finding the Fourth Proportional to 9,055.69, 13,521.58 and 8,112.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,055.69 : 13,521.58 = 8,112.55 : x
2. Step 2: Convert to fraction form
   9,055.69/13,521.58 = 8,112.55/x
3. Step 3: Cross multiply
   9,055.69x = 13,521.58 × 8,112.55
4. Step 4: Simplify right side
   9,055.69x = 109,694,493.83
5. Step 5: Solve for x
   x = 109,694,493.83/9,055.69
6. Step 6: Final answer
   x = 12,113.32