Finding the Fourth Proportional to 13,057.83, 18,019.94 and 7,089.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.83 : 18,019.94 = 7,089.55 : x
2. Step 2: Convert to fraction form
   13,057.83/18,019.94 = 7,089.55/x
3. Step 3: Cross multiply
   13,057.83x = 18,019.94 × 7,089.55
4. Step 4: Simplify right side
   13,057.83x = 127,753,185.13
5. Step 5: Solve for x
   x = 127,753,185.13/13,057.83
6. Step 6: Final answer
   x = 9,783.65