Finding the Fourth Proportional to 13,085.03, 18,056.82 and 7,116.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.03 : 18,056.82 = 7,116.69 : x
2. Step 2: Convert to fraction form
   13,085.03/18,056.82 = 7,116.69/x
3. Step 3: Cross multiply
   13,085.03x = 18,056.82 × 7,116.69
4. Step 4: Simplify right side
   13,085.03x = 128,504,817.01
5. Step 5: Solve for x
   x = 128,504,817.01/13,085.03
6. Step 6: Final answer
   x = 9,820.75