Finding the Fourth Proportional to 12,538.89, 17,303.06 and 7,505.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,538.89 : 17,303.06 = 7,505.87 : x
2. Step 2: Convert to fraction form
   12,538.89/17,303.06 = 7,505.87/x
3. Step 3: Cross multiply
   12,538.89x = 17,303.06 × 7,505.87
4. Step 4: Simplify right side
   12,538.89x = 129,874,524.69
5. Step 5: Solve for x
   x = 129,874,524.69/12,538.89
6. Step 6: Final answer
   x = 10,357.74