Finding the Fourth Proportional to 13,019.55, 17,966.46 and 7,641.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.55 : 17,966.46 = 7,641.25 : x
2. Step 2: Convert to fraction form
   13,019.55/17,966.46 = 7,641.25/x
3. Step 3: Cross multiply
   13,019.55x = 17,966.46 × 7,641.25
4. Step 4: Simplify right side
   13,019.55x = 137,286,254.29
5. Step 5: Solve for x
   x = 137,286,254.29/13,019.55
6. Step 6: Final answer
   x = 10,544.62