Finding the Fourth Proportional to 9,138.82, 12,594.56 and 7,146.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,138.82 : 12,594.56 = 7,146.22 : x
2. Step 2: Convert to fraction form
   9,138.82/12,594.56 = 7,146.22/x
3. Step 3: Cross multiply
   9,138.82x = 12,594.56 × 7,146.22
4. Step 4: Simplify right side
   9,138.82x = 90,003,496.56
5. Step 5: Solve for x
   x = 90,003,496.56/9,138.82
6. Step 6: Final answer
   x = 9,848.48