Finding the Fourth Proportional to 9,112.32, 12,574.71 and 5,133.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.32 : 12,574.71 = 5,133.20 : x
2. Step 2: Convert to fraction form
   9,112.32/12,574.71 = 5,133.20/x
3. Step 3: Cross multiply
   9,112.32x = 12,574.71 × 5,133.20
4. Step 4: Simplify right side
   9,112.32x = 64,548,438.50
5. Step 5: Solve for x
   x = 64,548,438.50/9,112.32
6. Step 6: Final answer
   x = 7,083.64