Finding the Fourth Proportional to 9,109.28, 12,570.83 and 5,331.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.28 : 12,570.83 = 5,331.76 : x
2. Step 2: Convert to fraction form
   9,109.28/12,570.83 = 5,331.76/x
3. Step 3: Cross multiply
   9,109.28x = 12,570.83 × 5,331.76
4. Step 4: Simplify right side
   9,109.28x = 67,024,648.56
5. Step 5: Solve for x
   x = 67,024,648.56/9,109.28
6. Step 6: Final answer
   x = 7,357.84