Finding the Fourth Proportional to 13,057.47, 18,019.52 and 7,089.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.47 : 18,019.52 = 7,089.14 : x
2. Step 2: Convert to fraction form
   13,057.47/18,019.52 = 7,089.14/x
3. Step 3: Cross multiply
   13,057.47x = 18,019.52 × 7,089.14
4. Step 4: Simplify right side
   13,057.47x = 127,742,854.78
5. Step 5: Solve for x
   x = 127,742,854.78/13,057.47
6. Step 6: Final answer
   x = 9,783.12