Finding the Fourth Proportional to 9,119.02, 12,582.85 and 5,139.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,119.02 : 12,582.85 = 5,139.36 : x
2. Step 2: Convert to fraction form
   9,119.02/12,582.85 = 5,139.36/x
3. Step 3: Cross multiply
   9,119.02x = 12,582.85 × 5,139.36
4. Step 4: Simplify right side
   9,119.02x = 64,667,870.15
5. Step 5: Solve for x
   x = 64,667,870.15/9,119.02
6. Step 6: Final answer
   x = 7,091.54