Finding the Fourth Proportional to 22,521.05, 31,080.96 and 13,089

Step by Step Solution

1. Step 1: Write the proportion equation
   22,521.05 : 31,080.96 = 13,089 : x
2. Step 2: Convert to fraction form
   22,521.05/31,080.96 = 13,089/x
3. Step 3: Cross multiply
   22,521.05x = 31,080.96 × 13,089
4. Step 4: Simplify right side
   22,521.05x = 406,818,685.44
5. Step 5: Solve for x
   x = 406,818,685.44/22,521.05
6. Step 6: Final answer
   x = 18,063.93