Finding the Fourth Proportional to 9,131.28, 12,601.35 and 5,357.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.28 : 12,601.35 = 5,357.34 : x
2. Step 2: Convert to fraction form
   9,131.28/12,601.35 = 5,357.34/x
3. Step 3: Cross multiply
   9,131.28x = 12,601.35 × 5,357.34
4. Step 4: Simplify right side
   9,131.28x = 67,509,716.41
5. Step 5: Solve for x
   x = 67,509,716.41/9,131.28
6. Step 6: Final answer
   x = 7,393.24