Finding the Fourth Proportional to 7,090.86, 9,786.27 and 5,409.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,090.86 : 9,786.27 = 5,409.30 : x
2. Step 2: Convert to fraction form
   7,090.86/9,786.27 = 5,409.30/x
3. Step 3: Cross multiply
   7,090.86x = 9,786.27 × 5,409.30
4. Step 4: Simplify right side
   7,090.86x = 52,936,870.31
5. Step 5: Solve for x
   x = 52,936,870.31/7,090.86
6. Step 6: Final answer
   x = 7,465.51