Finding the Fourth Proportional to 13,053.65, 18,013.98 and 7,085.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,053.65 : 18,013.98 = 7,085.27 : x
2. Step 2: Convert to fraction form
   13,053.65/18,013.98 = 7,085.27/x
3. Step 3: Cross multiply
   13,053.65x = 18,013.98 × 7,085.27
4. Step 4: Simplify right side
   13,053.65x = 127,633,831.61
5. Step 5: Solve for x
   x = 127,633,831.61/13,053.65
6. Step 6: Final answer
   x = 9,777.64