Finding the Fourth Proportional to 9,500.80, 13,112.38 and 7,138.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,500.80 : 13,112.38 = 7,138.84 : x
2. Step 2: Convert to fraction form
   9,500.80/13,112.38 = 7,138.84/x
3. Step 3: Cross multiply
   9,500.80x = 13,112.38 × 7,138.84
4. Step 4: Simplify right side
   9,500.80x = 93,607,182.84
5. Step 5: Solve for x
   x = 93,607,182.84/9,500.80
6. Step 6: Final answer
   x = 9,852.56