Finding the Fourth Proportional to 9,111.85, 12,574.73 and 5,133.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.85 : 12,574.73 = 5,133.20 : x
2. Step 2: Convert to fraction form
   9,111.85/12,574.73 = 5,133.20/x
3. Step 3: Cross multiply
   9,111.85x = 12,574.73 × 5,133.20
4. Step 4: Simplify right side
   9,111.85x = 64,548,554.00
5. Step 5: Solve for x
   x = 64,548,554.00/9,111.85
6. Step 6: Final answer
   x = 7,084.02