Finding the Fourth Proportional to 13,053.81, 18,014.15 and 7,085.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,053.81 : 18,014.15 = 7,085.48 : x
2. Step 2: Convert to fraction form
   13,053.81/18,014.15 = 7,085.48/x
3. Step 3: Cross multiply
   13,053.81x = 18,014.15 × 7,085.48
4. Step 4: Simplify right side
   13,053.81x = 127,638,899.54
5. Step 5: Solve for x
   x = 127,638,899.54/13,053.81
6. Step 6: Final answer
   x = 9,777.90