Finding the Fourth Proportional to 13,057.55, 18,019.59 and 7,089.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.55 : 18,019.59 = 7,089.32 : x
2. Step 2: Convert to fraction form
   13,057.55/18,019.59 = 7,089.32/x
3. Step 3: Cross multiply
   13,057.55x = 18,019.59 × 7,089.32
4. Step 4: Simplify right side
   13,057.55x = 127,746,678.18
5. Step 5: Solve for x
   x = 127,746,678.18/13,057.55
6. Step 6: Final answer
   x = 9,783.35