Finding the Fourth Proportional to 22,525.40, 31,079.90 and 13,449

Step by Step Solution

1. Step 1: Write the proportion equation
   22,525.40 : 31,079.90 = 13,449 : x
2. Step 2: Convert to fraction form
   22,525.40/31,079.90 = 13,449/x
3. Step 3: Cross multiply
   22,525.40x = 31,079.90 × 13,449
4. Step 4: Simplify right side
   22,525.40x = 417,993,575.10
5. Step 5: Solve for x
   x = 417,993,575.10/22,525.40
6. Step 6: Final answer
   x = 18,556.54