Finding the Fourth Proportional to 9,158.05, 12,631.12 and 7,884.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.05 : 12,631.12 = 7,884.03 : x
2. Step 2: Convert to fraction form
   9,158.05/12,631.12 = 7,884.03/x
3. Step 3: Cross multiply
   9,158.05x = 12,631.12 × 7,884.03
4. Step 4: Simplify right side
   9,158.05x = 99,584,129.01
5. Step 5: Solve for x
   x = 99,584,129.01/9,158.05
6. Step 6: Final answer
   x = 10,873.94