Finding the Fourth Proportional to 11,445.56, 17,145.84 and 7,538.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,445.56 : 17,145.84 = 7,538.12 : x
2. Step 2: Convert to fraction form
   11,445.56/17,145.84 = 7,538.12/x
3. Step 3: Cross multiply
   11,445.56x = 17,145.84 × 7,538.12
4. Step 4: Simplify right side
   11,445.56x = 129,247,399.42
5. Step 5: Solve for x
   x = 129,247,399.42/11,445.56
6. Step 6: Final answer
   x = 11,292.36