Finding the Fourth Proportional to 11,123.86, 15,350.97 and 7,145.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.86 : 15,350.97 = 7,145.01 : x
2. Step 2: Convert to fraction form
   11,123.86/15,350.97 = 7,145.01/x
3. Step 3: Cross multiply
   11,123.86x = 15,350.97 × 7,145.01
4. Step 4: Simplify right side
   11,123.86x = 109,682,834.16
5. Step 5: Solve for x
   x = 109,682,834.16/11,123.86
6. Step 6: Final answer
   x = 9,860.14