Finding the Fourth Proportional to 9,391.14, 12,955.72 and 5,409.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.14 : 12,955.72 = 5,409.88 : x
2. Step 2: Convert to fraction form
   9,391.14/12,955.72 = 5,409.88/x
3. Step 3: Cross multiply
   9,391.14x = 12,955.72 × 5,409.88
4. Step 4: Simplify right side
   9,391.14x = 70,088,890.51
5. Step 5: Solve for x
   x = 70,088,890.51/9,391.14
6. Step 6: Final answer
   x = 7,463.30