Finding the Fourth Proportional to 13,057.49, 18,019.43 and 7,089.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.49 : 18,019.43 = 7,089.18 : x
2. Step 2: Convert to fraction form
   13,057.49/18,019.43 = 7,089.18/x
3. Step 3: Cross multiply
   13,057.49x = 18,019.43 × 7,089.18
4. Step 4: Simplify right side
   13,057.49x = 127,742,982.77
5. Step 5: Solve for x
   x = 127,742,982.77/13,057.49
6. Step 6: Final answer
   x = 9,783.12