Finding the Fourth Proportional to 13,123.37, 18,110.41 and 7,155.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.37 : 18,110.41 = 7,155.14 : x
2. Step 2: Convert to fraction form
   13,123.37/18,110.41 = 7,155.14/x
3. Step 3: Cross multiply
   13,123.37x = 18,110.41 × 7,155.14
4. Step 4: Simplify right side
   13,123.37x = 129,582,430.69
5. Step 5: Solve for x
   x = 129,582,430.69/13,123.37
6. Step 6: Final answer
   x = 9,874.18