Finding the Fourth Proportional to 13,057.50, 18,019.36 and 7,089.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.50 : 18,019.36 = 7,089.17 : x
2. Step 2: Convert to fraction form
   13,057.50/18,019.36 = 7,089.17/x
3. Step 3: Cross multiply
   13,057.50x = 18,019.36 × 7,089.17
4. Step 4: Simplify right side
   13,057.50x = 127,742,326.45
5. Step 5: Solve for x
   x = 127,742,326.45/13,057.50
6. Step 6: Final answer
   x = 9,783.06