Finding the Fourth Proportional to 9,435.99, 13,021.05 and 5,186.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,435.99 : 13,021.05 = 5,186.23 : x
2. Step 2: Convert to fraction form
   9,435.99/13,021.05 = 5,186.23/x
3. Step 3: Cross multiply
   9,435.99x = 13,021.05 × 5,186.23
4. Step 4: Simplify right side
   9,435.99x = 67,530,147.04
5. Step 5: Solve for x
   x = 67,530,147.04/9,435.99
6. Step 6: Final answer
   x = 7,156.65