Finding the Fourth Proportional to 13,123.38, 18,110.37 and 7,155.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.38 : 18,110.37 = 7,155.03 : x
2. Step 2: Convert to fraction form
   13,123.38/18,110.37 = 7,155.03/x
3. Step 3: Cross multiply
   13,123.38x = 18,110.37 × 7,155.03
4. Step 4: Simplify right side
   13,123.38x = 129,580,240.66
5. Step 5: Solve for x
   x = 129,580,240.66/13,123.38
6. Step 6: Final answer
   x = 9,874.00