Finding the Fourth Proportional to 13,111.38, 18,094.14 and 7,142.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.38 : 18,094.14 = 7,142.76 : x
2. Step 2: Convert to fraction form
   13,111.38/18,094.14 = 7,142.76/x
3. Step 3: Cross multiply
   13,111.38x = 18,094.14 × 7,142.76
4. Step 4: Simplify right side
   13,111.38x = 129,242,099.43
5. Step 5: Solve for x
   x = 129,242,099.43/13,111.38
6. Step 6: Final answer
   x = 9,857.25