Finding the Fourth Proportional to 13,111.84, 18,094.50 and 7,143.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.84 : 18,094.50 = 7,143.56 : x
2. Step 2: Convert to fraction form
   13,111.84/18,094.50 = 7,143.56/x
3. Step 3: Cross multiply
   13,111.84x = 18,094.50 × 7,143.56
4. Step 4: Simplify right side
   13,111.84x = 129,259,146.42
5. Step 5: Solve for x
   x = 129,259,146.42/13,111.84
6. Step 6: Final answer
   x = 9,858.20