Finding the Fourth Proportional to 9,087.74, 12,540.75 and 5,109.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,087.74 : 12,540.75 = 5,109.22 : x
2. Step 2: Convert to fraction form
   9,087.74/12,540.75 = 5,109.22/x
3. Step 3: Cross multiply
   9,087.74x = 12,540.75 × 5,109.22
4. Step 4: Simplify right side
   9,087.74x = 64,073,425.17
5. Step 5: Solve for x
   x = 64,073,425.17/9,087.74
6. Step 6: Final answer
   x = 7,050.54