Finding the Fourth Proportional to 9,112.28, 12,574.67 and 5,133.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.28 : 12,574.67 = 5,133.30 : x
2. Step 2: Convert to fraction form
   9,112.28/12,574.67 = 5,133.30/x
3. Step 3: Cross multiply
   9,112.28x = 12,574.67 × 5,133.30
4. Step 4: Simplify right side
   9,112.28x = 64,549,527.84
5. Step 5: Solve for x
   x = 64,549,527.84/9,112.28
6. Step 6: Final answer
   x = 7,083.80