Finding the Fourth Proportional to 9,409.32, 12,983.93 and 5,431.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,409.32 : 12,983.93 = 5,431.72 : x
2. Step 2: Convert to fraction form
   9,409.32/12,983.93 = 5,431.72/x
3. Step 3: Cross multiply
   9,409.32x = 12,983.93 × 5,431.72
4. Step 4: Simplify right side
   9,409.32x = 70,525,033.01
5. Step 5: Solve for x
   x = 70,525,033.01/9,409.32
6. Step 6: Final answer
   x = 7,495.23