Finding the Fourth Proportional to 9,388.83, 12,942.79 and 7,146.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.83 : 12,942.79 = 7,146.80 : x
2. Step 2: Convert to fraction form
   9,388.83/12,942.79 = 7,146.80/x
3. Step 3: Cross multiply
   9,388.83x = 12,942.79 × 7,146.80
4. Step 4: Simplify right side
   9,388.83x = 92,499,570.33
5. Step 5: Solve for x
   x = 92,499,570.33/9,388.83
6. Step 6: Final answer
   x = 9,852.08