Finding the Fourth Proportional to 13,096.38, 18,073.39 and 7,128.44

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.38 : 18,073.39 = 7,128.44 : x
2. Step 2: Convert to fraction form
   13,096.38/18,073.39 = 7,128.44/x
3. Step 3: Cross multiply
   13,096.38x = 18,073.39 × 7,128.44
4. Step 4: Simplify right side
   13,096.38x = 128,834,985.84
5. Step 5: Solve for x
   x = 128,834,985.84/13,096.38
6. Step 6: Final answer
   x = 9,837.45