Finding the Fourth Proportional to 9,388.85, 12,942.79 and 7,146.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.85 : 12,942.79 = 7,146.81 : x
2. Step 2: Convert to fraction form
   9,388.85/12,942.79 = 7,146.81/x
3. Step 3: Cross multiply
   9,388.85x = 12,942.79 × 7,146.81
4. Step 4: Simplify right side
   9,388.85x = 92,499,643.13
5. Step 5: Solve for x
   x = 92,499,643.13/9,388.85
6. Step 6: Final answer
   x = 9,852.08