Finding the Fourth Proportional to 13,053.59, 18,013.79 and 7,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,053.59 : 18,013.79 = 7,085.34 : x
2. Step 2: Convert to fraction form
   13,053.59/18,013.79 = 7,085.34/x
3. Step 3: Cross multiply
   13,053.59x = 18,013.79 × 7,085.34
4. Step 4: Simplify right side
   13,053.59x = 127,633,844.55
5. Step 5: Solve for x
   x = 127,633,844.55/13,053.59
6. Step 6: Final answer
   x = 9,777.68