Finding the Fourth Proportional to 9,387.02, 12,957.32 and 5,409.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,387.02 : 12,957.32 = 5,409.71 : x
2. Step 2: Convert to fraction form
   9,387.02/12,957.32 = 5,409.71/x
3. Step 3: Cross multiply
   9,387.02x = 12,957.32 × 5,409.71
4. Step 4: Simplify right side
   9,387.02x = 70,095,316.53
5. Step 5: Solve for x
   x = 70,095,316.53/9,387.02
6. Step 6: Final answer
   x = 7,467.26